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

Ex Input:
Who did boxer Floyd Patterson defeat to regain the Heavyweight Championship in June 1960?

Ex Output:
boxing


Ex Input:
Carpo and Elara are moons of which planet?

Ex Output:
elara


Ex Input:
Who wrote the novel Cannery Row?

Ex Output:

cannery row