['he', 'die', 'relieve', 'pain', 'EmptyParameter']
['<PRP>', 'die-42.4-1', 'free-80', "Synset('state.n.02')", 'EmptyParameter']
He is still willing to die to relieve their pain.
<PRP> is still Synset('willing.a.01') to die to relieve <PRP> Synset('state.n.02').