['he', 'make', 'mistake', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'build-26.1', "Synset('idea.n.01')", 'EmptyParameter', 'EmptyParameter']
He made that mistake once and was not about to do it again.
<PRP> made that Synset('idea.n.01') once and was not about to do <PRP> again.