['Tucker', 'answer', 'knock', 'EmptyParameter', 'EmptyParameter']
['<PERSON>4', 'reciprocate-112', 'sound_emission-43.2', 'EmptyParameter', 'EmptyParameter']
Tucker answers a knock on the front door.
<PERSON>4 answers a knock on the Synset('front.a.01') Synset('access.n.03').