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

Ex Input:
Come Clean was the debut album by which 2000s band?

Ex Output:
come clean

Ex Input:
Who died of a burst appendix after being punched in the stomach?

Ex Output:
appendicitis

Ex Input:
Who was Elton John's collaborator in most of his early hits, such as Yellow Brick Road, Candle In The Wind, etc.?

Ex Output:
candle in the wind