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

Ex Input:
In which US state are the Catskill Mountains?

Ex Output:
catskill mountains


Ex Input:
Chelsea won the 2009 FA Cup final 2-1.  Who were the beaten finalists?

Ex Output:
2009 fa cup final


Ex Input:
Which film about a submarine had as one of its stars Denzil Washington, whose character had violent disagreements with his Captain played by Gene Hackman?

Ex Output:

denzel washington