['they', 'know', 'much', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'comprehend-87.2', "Synset('much.a.01')", 'EmptyParameter', 'EmptyParameter']
They don't know much about him at all.
<PRP> don't know Synset('much.a.01') about <PRP> at all.