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

Ex Input:
Although it was headquartered at Oak Ridge, TN, and the University of Chicago, what was the name of the WWII project that created the atomic bomb?

Ex Output:
nuclear weapon


Ex Input:
According to the bible, Zaccariah was the father of which New Testament figure?

Ex Output:
bible


Ex Input:
Eine Kleine Nachtmusik is a work by which composer?

Ex Output:

eine kleine nachtmusik