TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Cassandra, Grizabella and Skimbleshanks are all characters in which Andrew Lloyd Webber musical?

SOLUTION: andrew lloyd webber

PROBLEM: Who died of a burst appendix after being punched in the stomach?

SOLUTION: appendicitis

PROBLEM: Which novel by Charles Dickens has sold the most copies?

SOLUTION:
charles dickens