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

[Q]: What hit song by the Crash Test Dummies comprised four three-letter words all containing the same letter?
[A]: crash test dummies


[Q]: Which popular Doctor Who villains, it was revealed in 2011, are to be given 'a rest' by scriptwriters?
[A]: doctor who


[Q]: With which branch of the arts would you associate Barbara Hepworth?
[A]:
barbara hepworth