['he', 'see', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter'] ['Voyager', 'knock', 'barrier', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'discover-84', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter'] ['<VESSEL>2', 'hit-18.1', "Synset('natural_object.n.01')", 'EmptyParameter', 'EmptyParameter']
He can not see Voyager knocking down the barrier.
<PRP> can not see <VESSEL>2 knocking down the Synset('natural_object.n.01').