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

Ex Input:
What famous song from the film Butch Cassidy and the Sundance Kid won an Oscar for best song?

Ex Output:
academy award for best original song


Ex Input:
The Battle of Antietam was fought during which war?

Ex Output:
battle of antietam


Ex Input:
Which composer was born in Bradford in 1862?

Ex Output:

bradford