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

Ex Input:
Which Best Picture nominated movie tells the story of US soldier, 'Chris' Kyle?

Ex Output:
chris kyle


Ex Input:
What is the capital of the US state of California?

Ex Output:
california


Ex Input:
What de-facto independent country does China claim ownership of?

Ex Output:

china