Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

Ex Input:
Which instrument was Benny Goodman famous for playing?

Ex Output:
benny goodman


Ex Input:
What was the title of the first feature film made in Cinemascope?

Ex Output:
cinemascope


Ex Input:
Who played Sam the piano player and sang As Time Goes By in the film Casablanca?

Ex Output:

sam