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

Ex Input:
Who wrote `20,000 Leagues Under The Sea`?

Ex Output:
20,000 leagues under the sea


Ex Input:
Christian Grey is a character in what recent book trilogy?

Ex Output:
christian grey


Ex Input:
Who was first to win an Olympic gold medal for Britain in a throwing event?

Ex Output:

britain