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

Ex Input:
Whose tale in Chaucer's The Canterbury Tales tells of a knight sent away by his queen to discover what women want above all else?

Ex Output:
the canterbury tales


Ex Input:
Charon is a moon which orbits which body?

Ex Output:
charon


Ex Input:
What character was played by Bill Cosby in his long running TV series?

Ex Output:

bill cosby