['he', 'concern', 'EmptyParameter', 'friend', 'as']
['<PRP>', 'amuse-31.1', 'EmptyParameter', "Synset('person.n.01')", 'as']
He is concerned as her friend, not as her superior.
<PRP> is concerned as <PRP> friend, not as <PRP> Synset('superscript.a.01').