Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.

Ex Input:
a bite is a wound received from the teeth of an animal.

Ex Output:
bite


Ex Input:
lee soo-young (born lee ji-yeon april 12, 1979) is a korean ballad singer.

Ex Output:
lee soo-young


Ex Input:
professor paul webley cbe (19 november 1953 – 2 march 2016) was a british educator.

Ex Output:

paul webley