I am a reST document

And I am its subtitle

Rest allows inline style and other stuff, but I guess this code is enough.

unknown: arg1 arg2
We also support unknown directive, so that no content is lost if reST
specialization is parsed.

Of course we may also find new roles.

module: mymodule

This is a module that doesn't exist

function: foo()

In Sphinx documentation you could find this stuff.

print "I have no title"