['they', 'exchange', 'word', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'exchange-13.6.1', "Synset('identification.n.02')", 'EmptyParameter', 'EmptyParameter']
They are able to exchange simple words.
<PRP> are Synset('able.a.01') to exchange Synset('simple.a.06') Synset('identification.n.02').