instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Alejandro Amaya, Carlos Arruza, Jaime Bravo and Carmelo Torres are famous Mexican?
answer:
alejandro amaya


question:
What breed of dog is Marmaduke in the newspaper cartoon strip of that name?
answer:
dog


question:
Mount Etna and the Plain of Catania are on which island?
answer:

mount etna