['he', 'know', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter'] ['he', 'leave', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'comprehend-87.2', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter'] ['<PRP>', 'leave-51.2-1', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter']
He knew when he left his planet is long dead.
<PRP> knew when <PRP> left <PRP> Synset('person.n.01') is Synset('long.a.06') Synset('dead.a.02').