['he', 'keep', 'part', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'keep-15.2', "Synset('object.n.01')", 'EmptyParameter', 'EmptyParameter']
He had kept his part of the bargain.
<PRP> had kept <PRP> Synset('object.n.01') of the Synset('statement.n.01').