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:
sandpaper is a piece of paper with an abrasive glued to it.

Ex Output:
sandpaper


Ex Input:
sir philip anthony hopkins cbe (born 31 december 1937) is a welsh actor of movies, theater and television.

Ex Output:
anthony hopkins


Ex Input:
paula cole (born april 5, 1968) is an american singer and songwriter.

Ex Output:

paula cole