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

[EX Q]: Which major river has its source at the confluence of the rivers Brigach and Breg in the Black Forest?
[EX A]: breg

[EX Q]: Which US state was the title of a no. 1 hit for the Bee Gees in 1967?
[EX A]: bee gees

[EX Q]: Who wrote The Stepford Wives, Rosemary's Baby, and The Boys from Brazil?
[EX A]:
the boys from brazil