['engineer', 'lose', 'son', 'EmptyParameter', 'EmptyParameter']
["Synset('causal_agent.n.01')", 'remove-10.1', "Synset('child.n.02')", 'EmptyParameter', 'EmptyParameter']
The engineer loses a son.
the Synset('causal_agent.n.01') loses a Synset('child.n.02').