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

[Q]: Who bad a number 1 in the 1980's with Circle in the Sand?
[A]: circle in the sand


[Q]: Which river begins in the Rocky Mountains in south-west Colorado, crosses New Mexico and forms the border between Mexico and the USA before reaching the Gulf of Mexico?
[A]: new mexico


[Q]: Which screenwriter and novelist created the Daleks for the tv series Doctor Who?
[A]:
doctor who