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

Ex Input:
Which Beatle played Youngman Grand in The Magic Christian 1969, with Peter Sellers?

Ex Output:
the beatles


Ex Input:
Which biologist was known as Darwin's Bulldog?

Ex Output:
charles darwin


Ex Input:
With which boy-band did Mariah Carey cover the Phil Collins hit 'Against All Odds'?

Ex Output:

against all odds