['thing', 'keep', 'alive', 'EmptyParameter', 'EmptyParameter']
["Synset('entity.n.01')", 'keep-15.2', "Synset('animated.a.01')", 'EmptyParameter', 'EmptyParameter']
The only thing that keeps him alive after that is the will to get Voyager home.
the only Synset('entity.n.01') that keeps <PRP> Synset('animated.a.01') after that is the Synset('document.n.01') to get <VESSEL>0 Synset('baseball_equipment.n.01').