['he', 'have', 'reason', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'own-100', "Synset('mental_health.n.01')", 'EmptyParameter', 'EmptyParameter']
He may have had good reason to stage a little mutiny of his own.
<PRP> may have had Synset('good.a.01') Synset('mental_health.n.01') to stage a Synset('small.a.01') Synset('conflict.n.01') of <PRP> own.