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 second book of the Bible?

Ex Output:
bible


Ex Input:
Who succeeded Jon Pertwee as Doctor Who?

Ex Output:
doctor who


Ex Input:
Alexander Pushkin (1799-1837), revered as a great poet, also wrote which play or drama?

Ex Output:

alexander pushkin