['they', 'find', 'something', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'get-13.5.1', "Synset('entity.n.01')", 'EmptyParameter', 'EmptyParameter']
It is only a matter of time until they find something.
<PRP> is only a Synset('cognition.n.01') of Synset('time_period.n.01') until <PRP> find Synset('entity.n.01').