TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Who directed the film Black Swan (in ballet)?

SOLUTION: black swan

PROBLEM: Who was the scheming wife of the Roman emperor Claudius?

SOLUTION: claudius

PROBLEM: Chris Andrews got to no.3 in '65 with a title whose initials were YM. What was it?

SOLUTION:
chris andrews