['he', 'leave', 'spot', 'more', 'EmptyParameter']
['<PRP>', 'leave-51.2-1', 'fill-9.8', "Synset('more.a.02')", 'EmptyParameter']
He leaves, spotting more of them on the way.
<PRP> leaves, spotting Synset('more.a.02') of <PRP> on the Synset('concept.n.01').