['he', 'see', 'play', 'Proton', 'EmptyParameter']
['<PRP>', 'comprehend-87.2-1-1', 'meet-36.3-1', '<PERSON>4', 'EmptyParameter']
He is seen playing Captain Proton on the holodeck.
<PRP> is seen playing <PERSON>4 on the <LOCATION>3.