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

Answer: the canterbury tales


Question: Who was the CBS News anchor-man known as 'the man Americans most trust'?

Answer: news presenter


Question: Phobos and Diemos are the moons of which planet in our solar system?

Answer:
solar system