['they', 'impose', 'limitation', 'he', 'on']
['<PRP>', 'enforce-63', "Synset('time_period.n.01')", '<PRP>', 'on']
They may be imposing their own human limitations on him.
<PRP> may be imposing <PRP> own Synset('human.a.03') Synset('time_period.n.01') on <PRP>.