['he', 'let', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter'] ['they', 'treat', 'he', 'planet', 'on']
['<PRP>', 'let-64.2', 'EmptyParameter', 'EmptyParameter', 'EmptyParameter'] ['<PRP>', 'equip-13.4.2', '<PRP>', "Synset('natural_object.n.01')", 'on']
He didn't let them treat him down there on the planet.
<PRP> didn't let <PRP> treat <PRP> down there on the Synset('natural_object.n.01').