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

Ex Input:
Who plays Dr Evil the nemesis of Austin Powers in the Austin Powers series of films?

Ex Output:
austin powers


Ex Input:
Who wrote the novels About A Boy, How To Be Good and High Fidelity?

Ex Output:
how to be good


Ex Input:
The characters Denisov and Dolokhov appear in which famous novel?

Ex Output:

denisov