This package is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This package is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Genaral Public License for more details.

You should have received a copy og the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>

On Debian systems, the complete text of the GNU General
Public License version 2 can be found in "/usr/share/common-licenses/GPL-2". 

This package is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.

This package is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Genaral Public License for more details.

You should have received a copy og the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>

On Debian systems, the complete text of the GNU General
Public License version 3 can be found in "/usr/share/common-licenses/GPL-3". 

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

On Debian systems, the complete text of the GNU General
Public License version LGPL-2 can be found in "/usr/share/common-licenses/LGPL-2". 

               GNU Free Documentation License
                  Version 1.1, March 2000
-
Copyright (C) 2000  Free Software Foundation, Inc.
    51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.

0. PREAMBLE

The purpose of this License is to make a manual, textbook, or other
written document "free" in the sense of freedom: to assure everyone
the effective freedom to copy and redistribute it, with or without
modifying it, either commercially or noncommercially.  Secondarily,
this License preserves for the author and publisher a way to get
credit for their work, while not being considered responsible for
modifications made by others.

This License is a kind of "copyleft", which means that derivative
works of the document must themselves be free in the same sense.  It
complements the GNU General Public License, which is a copyleft
license designed for free software.

We have designed this License in order to use it for manuals for free
software, because free software needs free documentation: a free
program should come with manuals providing the same freedoms that the
software does.  But this License is not limited to software manuals;
it can be used for any textual work, regardless of subject matter or
whether it is published as a printed book.  We recommend this License
principally for works whose purpose is instruction or reference.


1. APPLICABILITY AND DEFINITIONS

This License applies to any manual or other work that contains a
notice placed by the copyright holder saying it can be distributed
under the terms of this License.  The "Document", below, refers to any
such manual or work.  Any member of the public is a licensee, and is
addressed as "you".

A "Modified Version" of the Document means any work containing the
Document or a portion of it, either copied verbatim, or with
modifications and/or translated into another language.

A "Secondary Section" is a named appendix or a front-matter section of
the Document that deals exclusively with the relationship of the
publishers or authors of the Document to the Document's overall subject
(or to related matters) and contains nothing that could fall directly
within that overall subject.  (For example, if the Document is in part a
textbook of mathematics, a Secondary Section may not explain any
mathematics.)  The relationship could be a matter of historical
connection with the subject or with related matters, or of legal,
commercial, philosophical, ethical or political position regarding
them.

The "Invariant Sections" are certain Secondary Sections whose titles
are designated, as being those of Invariant Sections, in the notice
that says that the Document is released under this License.

The "Cover Texts" are certain short passages of text that are listed,
as Front-Cover Texts or Back-Cover Texts, in the notice that says that
the Document is released under this License.

A "Transparent" copy of the Document means a machine-readable copy,
represented in a format whose specification is available to the
general public, whose contents can be viewed and edited directly and
straightforwardly with generic text editors or (for images composed of
pixels) generic paint programs or (for drawings) some widely available
drawing editor, and that is suitable for input to text formatters or
for automatic translation to a variety of formats suitable for input
to text formatters.  A copy made in an otherwise Transparent file
format whose markup has been designed to thwart or discourage
subsequent modification by readers is not Transparent.  A copy that is
not "Transparent" is called "Opaque".

Examples of suitable formats for Transparent copies include plain
ASCII without markup, Texinfo input format, LaTeX input format, SGML
or XML using a publicly available DTD, and standard-conforming simple
HTML designed for human modification.  Opaque formats include
PostScript, PDF, proprietary formats that can be read and edited only
by proprietary word processors, SGML or XML for which the DTD and/or
processing tools are not generally available, and the
machine-generated HTML produced by some word processors for output
purposes only.

The "Title Page" means, for a printed book, the title page itself,
plus such following pages as are needed to hold, legibly, the material
this License requires to appear in the title page.  For works in
formats which do not have any title page as such, "Title Page" means
the text near the most prominent appearance of the work's title,
preceding the beginning of the body of the text.


2. VERBATIM COPYING

You may copy and distribute the Document in any medium, either
commercially or noncommercially, provided that this License, the
copyright notices, and the license notice saying this License applies
to the Document are reproduced in all copies, and that you add no other
conditions whatsoever to those of this License.  You may not use
technical measures to obstruct or control the reading or further
copying of the copies you make or distribute.  However, you may accept
compensation in exchange for copies.  If you distribute a large enough
number of copies you must also follow the conditions in section 3.

You may also lend copies, under the same conditions stated above, and
you may publicly display copies.


3. COPYING IN QUANTITY

If you publish printed copies of the Document numbering more than 100,
and the Document's license notice requires Cover Texts, you must enclose
the copies in covers that carry, clearly and legibly, all these Cover
Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on
the back cover.  Both covers must also clearly and legibly identify
you as the publisher of these copies.  The front cover must present
the full title with all words of the title equally prominent and
visible.  You may add other material on the covers in addition.
Copying with changes limited to the covers, as long as they preserve
the title of the Document and satisfy these conditions, can be treated
as verbatim copying in other respects.

If the required texts for either cover are too voluminous to fit
legibly, you should put the first ones listed (as many as fit
reasonably) on the actual cover, and continue the rest onto adjacent
pages.

If you publish or distribute Opaque copies of the Document numbering
more than 100, you must either include a machine-readable Transparent
copy along with each Opaque copy, or state in or with each Opaque copy
a publicly-accessible computer-network location containing a complete
Transparent copy of the Document, free of added material, which the
general network-using public has access to download anonymously at no
charge using public-standard network protocols.  If you use the latter
option, you must take reasonably prudent steps, when you begin
distribution of Opaque copies in quantity, to ensure that this
Transparent copy will remain thus accessible at the stated location
until at least one year after the last time you distribute an Opaque
copy (directly or through your agents or retailers) of that edition to
the public.

It is requested, but not required, that you contact the authors of the
Document well before redistributing any large number of copies, to give
them a chance to provide you with an updated version of the Document.


4. MODIFICATIONS

You may copy and distribute a Modified Version of the Document under
the conditions of sections 2 and 3 above, provided that you release
the Modified Version under precisely this License, with the Modified
Version filling the role of the Document, thus licensing distribution
and modification of the Modified Version to whoever possesses a copy
of it.  In addition, you must do these things in the Modified Version:

A. Use in the Title Page (and on the covers, if any) a title distinct
   from that of the Document, and from those of previous versions
   (which should, if there were any, be listed in the History section
   of the Document).  You may use the same title as a previous version
   if the original publisher of that version gives permission.
B. List on the Title Page, as authors, one or more persons or entities
   responsible for authorship of the modifications in the Modified
   Version, together with at least five of the principal authors of the
   Document (all of its principal authors, if it has less than five).
C. State on the Title page the name of the publisher of the
   Modified Version, as the publisher.
D. Preserve all the copyright notices of the Document.
E. Add an appropriate copyright notice for your modifications
   adjacent to the other copyright notices.
F. Include, immediately after the copyright notices, a license notice
   giving the public permission to use the Modified Version under the
   terms of this License, in the form shown in the Addendum below.
G. Preserve in that license notice the full lists of Invariant Sections
   and required Cover Texts given in the Document's license notice.
H. Include an unaltered copy of this License.
I. Preserve the section entitled "History", and its title, and add to
   it an item stating at least the title, year, new authors, and
   publisher of the Modified Version as given on the Title Page.  If
   there is no section entitled "History" in the Document, create one
   stating the title, year, authors, and publisher of the Document as
   given on its Title Page, then add an item describing the Modified
   Version as stated in the previous sentence.
J. Preserve the network location, if any, given in the Document for
   public access to a Transparent copy of the Document, and likewise
   the network locations given in the Document for previous versions
   it was based on.  These may be placed in the "History" section.
   You may omit a network location for a work that was published at
   least four years before the Document itself, or if the original
   publisher of the version it refers to gives permission.
K. In any section entitled "Acknowledgements" or "Dedications",
   preserve the section's title, and preserve in the section all the
   substance and tone of each of the contributor acknowledgements
   and/or dedications given therein.
L. Preserve all the Invariant Sections of the Document,
   unaltered in their text and in their titles.  Section numbers
   or the equivalent are not considered part of the section titles.
M. Delete any section entitled "Endorsements".  Such a section
   may not be included in the Modified Version.
N. Do not retitle any existing section as "Endorsements"
   or to conflict in title with any Invariant Section.

If the Modified Version includes new front-matter sections or
appendices that qualify as Secondary Sections and contain no material
copied from the Document, you may at your option designate some or all
of these sections as invariant.  To do this, add their titles to the
list of Invariant Sections in the Modified Version's license notice.
These titles must be distinct from any other section titles.

You may add a section entitled "Endorsements", provided it contains
nothing but endorsements of your Modified Version by various
parties--for example, statements of peer review or that the text has
been approved by an organization as the authoritative definition of a
standard.

You may add a passage of up to five words as a Front-Cover Text, and a
passage of up to 25 words as a Back-Cover Text, to the end of the list
of Cover Texts in the Modified Version.  Only one passage of
Front-Cover Text and one of Back-Cover Text may be added by (or
through arrangements made by) any one entity.  If the Document already
includes a cover text for the same cover, previously added by you or
by arrangement made by the same entity you are acting on behalf of,
you may not add another; but you may replace the old one, on explicit
permission from the previous publisher that added the old one.

The author(s) and publisher(s) of the Document do not by this License
give permission to use their names for publicity for or to assert or
imply endorsement of any Modified Version.


5. COMBINING DOCUMENTS

You may combine the Document with other documents released under this
License, under the terms defined in section 4 above for modified
versions, provided that you include in the combination all of the
Invariant Sections of all of the original documents, unmodified, and
list them all as Invariant Sections of your combined work in its
license notice.

The combined work need only contain one copy of this License, and
multiple identical Invariant Sections may be replaced with a single
copy.  If there are multiple Invariant Sections with the same name but
different contents, make the title of each such section unique by
adding at the end of it, in parentheses, the name of the original
author or publisher of that section if known, or else a unique number.
Make the same adjustment to the section titles in the list of
Invariant Sections in the license notice of the combined work.

In the combination, you must combine any sections entitled "History"
in the various original documents, forming one section entitled
"History"; likewise combine any sections entitled "Acknowledgements",
and any sections entitled "Dedications".  You must delete all sections
entitled "Endorsements."


6. COLLECTIONS OF DOCUMENTS

You may make a collection consisting of the Document and other documents
released under this License, and replace the individual copies of this
License in the various documents with a single copy that is included in
the collection, provided that you follow the rules of this License for
verbatim copying of each of the documents in all other respects.

You may extract a single document from such a collection, and distribute
it individually under this License, provided you insert a copy of this
License into the extracted document, and follow this License in all
other respects regarding verbatim copying of that document.


7. AGGREGATION WITH INDEPENDENT WORKS

A compilation of the Document or its derivatives with other separate
and independent documents or works, in or on a volume of a storage or
distribution medium, does not as a whole count as a Modified Version
of the Document, provided no compilation copyright is claimed for the
compilation.  Such a compilation is called an "aggregate", and this
License does not apply to the other self-contained works thus compiled
with the Document, on account of their being thus compiled, if they
are not themselves derivative works of the Document.

If the Cover Text requirement of section 3 is applicable to these
copies of the Document, then if the Document is less than one quarter
of the entire aggregate, the Document's Cover Texts may be placed on
covers that surround only the Document within the aggregate.
Otherwise they must appear on covers around the whole aggregate.


8. TRANSLATION

Translation is considered a kind of modification, so you may
distribute translations of the Document under the terms of section 4.
Replacing Invariant Sections with translations requires special
permission from their copyright holders, but you may include
translations of some or all Invariant Sections in addition to the
original versions of these Invariant Sections.  You may include a
translation of this License provided that you also include the
original English version of this License.  In case of a disagreement
between the translation and the original English version of this
License, the original English version will prevail.


9. TERMINATION

You may not copy, modify, sublicense, or distribute the Document except
as expressly provided for under this License.  Any other attempt to
copy, modify, sublicense or distribute the Document is void, and will
automatically terminate your rights under this License.  However,
parties who have received copies, or rights, from you under this
License will not have their licenses terminated so long as such
parties remain in full compliance.


10. FUTURE REVISIONS OF THIS LICENSE

The Free Software Foundation may publish new, revised versions
of the GNU Free Documentation License from time to time.  Such new
versions will be similar in spirit to the present version, but may
differ in detail to address new problems or concerns.  See
https://www.gnu.org/licenses/.

Each version of the License is given a distinguishing version number.
If the Document specifies that a particular numbered version of this
License "or any later version" applies to it, you have the option of
following the terms and conditions either of that specified version or
of any later version that has been published (not as a draft) by the
Free Software Foundation.  If the Document does not specify a version
number of this License, you may choose any version ever published (not
as a draft) by the Free Software Foundation.


ADDENDUM: How to use this License for your documents

To use this License in a document you have written, include a copy of
the License in the document and put the following copyright and
license notices just after the title page:

      Copyright (c)  YEAR  YOUR NAME.
      Permission is granted to copy, distribute and/or modify this document
      under the terms of the GNU Free Documentation License, Version 1.1
      or any later version published by the Free Software Foundation;
      with the Invariant Sections being LIST THEIR TITLES, with the
      Front-Cover Texts being LIST, and with the Back-Cover Texts being LIST.
      A copy of the license is included in the section entitled "GNU
      Free Documentation License".

If you have no Invariant Sections, write "with no Invariant Sections"
instead of saying which ones are invariant.  If you have no
Front-Cover Texts, write "no Front-Cover Texts" instead of
"Front-Cover Texts being LIST"; likewise for Back-Cover Texts.

If your document contains nontrivial examples of program code, we
recommend releasing these examples in parallel under your choice of
free software license, such as the GNU General Public License,
to permit their use in free software. 

THE WORK (AS DEFINED BELOW) IS PROVIDED UNDER THE TERMS OF THIS CREATIVE
COMMONS PUBLIC LICENSE ("CCPL" OR "LICENSE"). THE WORK IS PROTECTED BY
COPYRIGHT AND/OR OTHER APPLICABLE LAW. ANY USE OF THE WORK OTHER THAN AS
AUTHORIZED UNDER THIS LICENSE OR COPYRIGHT LAW IS PROHIBITED.

BY EXERCISING ANY RIGHTS TO THE WORK PROVIDED HERE, YOU ACCEPT AND AGREE
TO BE BOUND BY THE TERMS OF THIS LICENSE. TO THE EXTENT THIS LICENSE MAY
BE CONSIDERED TO BE A CONTRACT, THE LICENSOR GRANTS YOU THE RIGHTS
CONTAINED HERE IN CONSIDERATION OF YOUR ACCEPTANCE OF SUCH TERMS AND
CONDITIONS.

1. Definitions

a. "Adaptation" means a work based upon the Work, or upon the Work and
   other pre-existing works, such as a translation, adaptation,
   derivative work, arrangement of music or other alterations of a
   literary or artistic work, or phonogram or performance and includes
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   recast, transformed, or adapted including in any form recognizably
   derived from the original, except that a work that constitutes a
   Collection will not be considered an Adaptation for the purpose of
   this License. For the avoidance of doubt, where the Work is a musical
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   timed-relation with a moving image ("synching") will be considered an
   Adaptation for the purpose of this License.
b. "Collection" means a collection of literary or artistic works, such as
   encyclopedias and anthologies, or performances, phonograms or
   broadcasts, or other works or subject matter other than works listed
   in Section 1(f) below, which, by reason of the selection and
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   which the Work is included in its entirety in unmodified form along
   with one or more other contributions, each constituting separate and
   independent works in themselves, which together are assembled into a
   collective whole. A work that constitutes a Collection will not be
   considered an Adaptation (as defined below) for the purposes of this
   License.
c. "Creative Commons Compatible License" means a license that is listed
   at http://creativecommons.org/compatiblelicenses that has been
   approved by Creative Commons as being essentially equivalent to this
   License, including, at a minimum, because that license: (i) contains
   terms that have the same purpose, meaning and effect as the License
   Elements of this License; and, (ii) explicitly permits the relicensing
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d. "Distribute" means to make available to the public the original and
   copies of the Work or Adaptation, as appropriate, through sale or
   other transfer of ownership.
e. "License Elements" means the following high-level license attributes
   as selected by Licensor and indicated in the title of this License:
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f. "Licensor" means the individual, individuals, entity or entities that
   offer(s) the Work under the terms of this License.
g. "Original Author" means, in the case of a literary or artistic work,
   the individual, individuals, entity or entities who created the Work
   or if no individual or entity can be identified, the publisher; and in
   addition (i) in the case of a performance the actors, singers,
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h. "Work" means the literary and/or artistic work offered under the terms
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   literary, scientific and artistic domain, whatever may be the mode or
   form of its expression including digital form, such as a book,
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   extent it is protected as a copyrightable work; or a work performed by
   a variety or circus performer to the extent it is not otherwise
   considered a literary or artistic work.
i. "You" means an individual or entity exercising rights under this
   License who has not previously violated the terms of this License with
   respect to the Work, or who has received express permission from the
   Licensor to exercise rights under this License despite a previous
   violation.
j. "Publicly Perform" means to perform public recitations of the Work and
   to communicate to the public those public recitations, by any means or
   process, including by wire or wireless means or public digital
   performances; to make available to the public Works in such a way that
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k. "Reproduce" means to make copies of the Work by any means including
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   fixation and reproducing fixations of the Work, including storage of a
   protected performance or phonogram in digital form or other electronic
   medium.

2. Fair Dealing Rights. Nothing in this License is intended to reduce,
limit, or restrict any uses free from copyright or rights arising from
limitations or exceptions that are provided for in connection with the
copyright protection under copyright law or other applicable laws.

3. License Grant. Subject to the terms and conditions of this License,
Licensor hereby grants You a worldwide, royalty-free, non-exclusive,
perpetual (for the duration of the applicable copyright) license to
exercise the rights in the Work as stated below:

a. to Reproduce the Work, to incorporate the Work into one or more
   Collections, and to Reproduce the Work as incorporated in the
   Collections;
b. to create and Reproduce Adaptations provided that any such Adaptation,
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   clearly label, demarcate or otherwise identify that changes were made
   to the original Work. For example, a translation could be marked "The
   original work was translated from English to Spanish," or a
   modification could indicate "The original work has been modified.";
c. to Distribute and Publicly Perform the Work including as incorporated
   in Collections; and,
d. to Distribute and Publicly Perform Adaptations.
e. For the avoidance of doubt:

    i. Non-waivable Compulsory License Schemes. In those jurisdictions in
       which the right to collect royalties through any statutory or
       compulsory licensing scheme cannot be waived, the Licensor
       reserves the exclusive right to collect such royalties for any
       exercise by You of the rights granted under this License;
   ii. Waivable Compulsory License Schemes. In those jurisdictions in
       which the right to collect royalties through any statutory or
       compulsory licensing scheme can be waived, the Licensor waives the
       exclusive right to collect such royalties for any exercise by You
       of the rights granted under this License; and,
  iii. Voluntary License Schemes. The Licensor waives the right to
       collect royalties, whether individually or, in the event that the
       Licensor is a member of a collecting society that administers
       voluntary licensing schemes, via that society, from any exercise
       by You of the rights granted under this License.

The above rights may be exercised in all media and formats whether now
known or hereafter devised. The above rights include the right to make
such modifications as are technically necessary to exercise the rights in
other media and formats. Subject to Section 8(f), all rights not expressly
granted by Licensor are hereby reserved.

4. Restrictions. The license granted in Section 3 above is expressly made
subject to and limited by the following restrictions:

a. You may Distribute or Publicly Perform the Work only under the terms
   of this License. You must include a copy of, or the Uniform Resource
   Identifier (URI) for, this License with every copy of the Work You
   Distribute or Publicly Perform. You may not offer or impose any terms
   on the Work that restrict the terms of this License or the ability of
   the recipient of the Work to exercise the rights granted to that
   recipient under the terms of the License. You may not sublicense the
   Work. You must keep intact all notices that refer to this License and
   to the disclaimer of warranties with every copy of the Work You
   Distribute or Publicly Perform. When You Distribute or Publicly
   Perform the Work, You may not impose any effective technological
   measures on the Work that restrict the ability of a recipient of the
   Work from You to exercise the rights granted to that recipient under
   the terms of the License. This Section 4(a) applies to the Work as
   incorporated in a Collection, but this does not require the Collection
   apart from the Work itself to be made subject to the terms of this
   License. If You create a Collection, upon notice from any Licensor You
   must, to the extent practicable, remove from the Collection any credit
   as required by Section 4(c), as requested. If You create an
   Adaptation, upon notice from any Licensor You must, to the extent
   practicable, remove from the Adaptation any credit as required by
   Section 4(c), as requested.
b. You may Distribute or Publicly Perform an Adaptation only under the
   terms of: (i) this License; (ii) a later version of this License with
   the same License Elements as this License; (iii) a Creative Commons
   jurisdiction license (either this or a later license version) that
   contains the same License Elements as this License (e.g.,
   Attribution-ShareAlike 3.0 US)); (iv) a Creative Commons Compatible
   License. If you license the Adaptation under one of the licenses
   mentioned in (iv), you must comply with the terms of that license. If
   you license the Adaptation under the terms of any of the licenses
   mentioned in (i), (ii) or (iii) (the "Applicable License"), you must
   comply with the terms of the Applicable License generally and the
   following provisions: (I) You must include a copy of, or the URI for,
   the Applicable License with every copy of each Adaptation You
   Distribute or Publicly Perform; (II) You may not offer or impose any
   terms on the Adaptation that restrict the terms of the Applicable
   License or the ability of the recipient of the Adaptation to exercise
   the rights granted to that recipient under the terms of the Applicable
   License; (III) You must keep intact all notices that refer to the
   Applicable License and to the disclaimer of warranties with every copy
   of the Work as included in the Adaptation You Distribute or Publicly
   Perform; (IV) when You Distribute or Publicly Perform the Adaptation,
   You may not impose any effective technological measures on the
   Adaptation that restrict the ability of a recipient of the Adaptation
   from You to exercise the rights granted to that recipient under the
   terms of the Applicable License. This Section 4(b) applies to the
   Adaptation as incorporated in a Collection, but this does not require
   the Collection apart from the Adaptation itself to be made subject to
   the terms of the Applicable License.
c. If You Distribute, or Publicly Perform the Work or any Adaptations or
   Collections, You must, unless a request has been made pursuant to
   Section 4(a), keep intact all copyright notices for the Work and
   provide, reasonable to the medium or means You are utilizing: (i) the
   name of the Original Author (or pseudonym, if applicable) if supplied,
   and/or if the Original Author and/or Licensor designate another party
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