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

[EX Q]: Who had a hit album in 2010 with Can't Be Tamed?
[EX A]: can't be tamed

[EX Q]: The Greeks called her Athena, what was the Roman name for this Goddess?
[EX A]: athena

[EX Q]: Which actress is married to singer Chris Martin?
[EX A]:
chris martin