['he', 'need', 'know', 'EmptyParameter', 'EmptyParameter'] ['he', 'know', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter'] ['weapon', 'cause', 'injury', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'require-103-2', 'comprehend-87.2', 'EmptyParameter', 'EmptyParameter'] ['<PRP>', 'comprehend-87.2', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter'] ["Synset('communication.n.01')", 'engender-27.1-1', "Synset('pathological_state.n.01')", 'EmptyParameter', 'EmptyParameter']
He needs to know what weapon caused his injuries.
<PRP> needs to know what Synset('communication.n.01') caused <PRP> Synset('pathological_state.n.01').