['she', 'locate', 'cause', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'locate', "Synset('beginning.n.01')", 'EmptyParameter', 'EmptyParameter']
She was unable to locate the cause of the discharges.
<PRP> was Synset('unable.a.01') to locate the Synset('beginning.n.01') of the Synset('change_of_state.n.01').