['he', 'think', 'EmptyParameter', 'they', 'of']
['<PRP>', 'focus-87.1', 'EmptyParameter', '<PRP>', 'of']
However, he is thinking of them in terms of the prize fight.
However, <PRP> is thinking of <PRP> in Synset('sculpture.n.01') of the Synset('symbol.n.01') Synset('group_action.n.01').