TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: In which constellation is the star Deneb?

SOLUTION: deneb

PROBLEM: What nationality was Che Guevara?

SOLUTION: che guevara

PROBLEM: Which Irving Berlin musical of 1946 includes the songs Anything You Can Do and I Got Sun in the Morning?

SOLUTION:
anything you can do