['doctor', 'want', 'drop', 'EmptyParameter', 'EmptyParameter'] ['doctor', 'drop', 'he', 'EmptyParameter', 'EmptyParameter']
['<PERSON>5', 'want-32.1-1-1', 'meander-47.7', 'EmptyParameter', 'EmptyParameter'] ['<PERSON>5', 'meander-47.7', '<PRP>', 'EmptyParameter', 'EmptyParameter']
The Doctor may want to drop him.
<PERSON>5 may want to drop <PRP>.