['he', 'see', 'EmptyParameter', 'planet', 'on']
['<PRP>', 'see-30.1-1-1', 'EmptyParameter', "Synset('natural_object.n.01')", 'on']
He saw down on the planet is her.
<PRP> saw down on the Synset('natural_object.n.01') is <PRP>.