['he', 'study', 'landmark', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'discover-84-1-1', "Synset('body_part.n.01')", 'EmptyParameter', 'EmptyParameter']
He has been studying Earth landmarks.
<PRP> has been studying <LOCATION>2 Synset('body_part.n.01').