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

Ex Input:
What was Casanova's occupation at the time of is death?

Ex Output:
giacomo casanova

Ex Input:
The song Don't Rain On My Parade features in which musical?

Ex Output:
don't rain on my parade

Ex Input:
What is the title of a detective crime novel by Robert B. Parker, written as an authorised sequel to The Big Sleep by Raymond Chandler?

Ex Output:
the big sleep