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

Released last month, People, Hell and Angels is a posthumous album made up of songs recorded by which artist in 1969 ?
angel

Brasilia is the capital but which city in Brazil has the largest population?
brazil

John and Edward Grimes, who first appeared on ITV's 2009 X Factor, are known by what name?
edward grimes