TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Krist Novoselic and Dave Grohl were two thirds of which band, formed in Aberdeen (Washington State) whose albums include Bleach and In Utero?

SOLUTION: dave grohl

PROBLEM: In which war was the Battle of Bunker Hill?

SOLUTION: battle of bunker hill

PROBLEM: 'Band of Joy' is the latest album (2010) for which artist?

SOLUTION:
band of joy