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

Ex Input:
Which of the American Idol judges has been there for all 10 seasons?

Ex Output:
american idol


Ex Input:
Who had hits with Stepping Out and Different For Girls?

Ex Output:
different for girls


Ex Input:
Who wrote the first song Come On Rolling Stones recorded 63?

Ex Output:

come on