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

[EX Q]: Chep Lap Kok airport is located where?
[EX A]: hong kong international airport

[EX Q]: What was the title of Britney Spears' second album (and the single that was released from it)?
[EX A]: britney spears

[EX Q]: Katherine Hepburn won an 'Oscar' for her portrayal of Henry II's wife, Eleanor, in which 1968 film?
[EX A]:
katharine hepburn