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

[EX Q]: Which Frenchman composed Clair de lune, the famous third movement of Suite bergamasque?
[EX A]: suite bergamasque

[EX Q]: Field Marshal Arthur Wellesley, shares his better known title with which Southern Hemisphere capital city?
[EX A]: arthur wellesley, 1st duke of wellington

[EX Q]: In the line in `Casablanca` which is often misquoted as `Play it again, Sam`, what song is Sam asked to play?
[EX A]:
casablanca