['he', 'use', 'captain', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'use-105.1', "Synset('employee.n.01')", 'EmptyParameter', 'EmptyParameter']
He used to be the captain of a cargo vessel.
<PRP> used to be the Synset('employee.n.01') of a Synset('commodity.n.01') Synset('instrumentality.n.03').