['he', 'choose', 'they', 'EmptyParameter', 'EmptyParameter']
['<PRP>', 'get-13.5.1', '<PRP>', 'EmptyParameter', 'EmptyParameter']
He must choose one of them while remaining neutral himself, not indicating any personal preference of either officer to not affect The Doctor's decision.
<PRP> must choose one of <PRP> while remaining Synset('neutral.a.04') himself, not indicating any Synset('personal.a.05') Synset('asset.n.01') of Synset('physical_entity.n.01') Synset('sailor.n.01') to not affect <PERSON>0 Doctor's Synset('trait.n.01').