instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Which film actor became mayor of Carmel, California in 1986?
answer:
carmel-by-the-sea, california


question:
Chris Martin is the lead singer with which band who had several hits in the 2000s?
answer:
chris martin


question:
Who plays Mrs. Smith opposite Brad Pitt in the movie Mr. and Mrs. Smith?
answer:

brad pitt