['people', 'keep', 'pet', 'EmptyParameter', 'EmptyParameter']
["Synset('abstraction.n.06')", 'keep-15.2', "Synset('pictorial_representation.n.01')", 'EmptyParameter', 'EmptyParameter']
His people don't keep any pets.
<PRP> Synset('abstraction.n.06') don't keep any Synset('pictorial_representation.n.01').