['they', 'find', 'skeleton', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'discover-84', "Synset('body_part.n.01')", 'EmptyParameter', 'EmptyParameter']
They find the skeletons of the victims.
<PRP> find the Synset('body_part.n.01') of the Synset('causal_agent.n.01').