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

[EX Q]: Who has written a series of novels, entitled The Dark Tower, of which the first, in 1982, was entitled, The Gunslinger?
[EX A]: the dark tower

[EX Q]: What are Proxima Centauri, Sirius A, Pollux, Arcturus and Betelgeuse?
[EX A]: arcturus

[EX Q]: What language is the language Afrikaans derived from?
[EX A]:
afrikaans