['they', 'discuss', 'situation', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'chit_chat-37.6', "Synset('attribute.n.02')", 'EmptyParameter', 'EmptyParameter']
They discuss the situation on the planet.
<PRP> discuss the Synset('attribute.n.02') on the Synset('natural_object.n.01').