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

[Q]: Krist Novoselic and Dave Grohl were two thirds of which band, formed in Aberdeen (Washington State) whose albums include Bleach and In Utero?
[A]: dave grohl


[Q]: Who succeeded Jon Pertwee as Doctor Who?
[A]: doctor who


[Q]: Who managed Arsenal to the league title in 1989 and 1991?
[A]:
arsenal