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

Ex Input:
What is the name of the co-founder of Apple Computers who died in October 2011?

Ex Output:
apple inc.


Ex Input:
Which Chuck Berry song is performed by Marty McFly at the end of the film Back to the Future?

Ex Output:
back to the future


Ex Input:
Who directed the 2010 Disney film Alice in Wonderland?

Ex Output:

alice in wonderland