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<?xml version="1.0"?>
<opsa-mef>
<define-fault-tree name="r">
<define-gate name="r">
<or>
<event name="e1"/>
<gate name="g1"/>
</or>
</define-gate>
<define-gate name="g1">
<and>
<gate name="g2"/>
<gate name="g3"/>
<gate name="g4"/>
</and>
</define-gate>
<define-gate name="g2">
<or>
<event name="e2"/>
<event name="e3"/>
</or>
</define-gate>
<define-gate name="g3">
<or>
<event name="e2"/>
<event name="e4"/>
</or>
</define-gate>
<define-gate name="g4">
<or>
<event name="e4"/>
<event name="e1"/>
</or>
</define-gate>
</define-fault-tree>
</opsa-mef>
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