['they', 'know', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'comprehend-87.2', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
They don't know how far up the next access port is.
<PRP> don't know how far up the next Synset('abstraction.n.01') Synset('surface.n.01') is.