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

Ex Input:
Charon is a moon which orbits which body?

Ex Output:
charon


Ex Input:
Which Bob Dylan song begins You got a lotta nerveTo say you are my friend. When I was down, You just stood there grinning?

Ex Output:
bob dylan


Ex Input:
Which film about the founding of Facebook won the Best Motion Picture Drama at the 2011 Golden Globe awards?

Ex Output:

facebook