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

[Q]: Where is the Barbary Coast?
[A]: barbary coast


[Q]: Name Alfred Hitchcock's first sound film as director?
[A]: alfred hitchcock


[Q]: What does the DSM IV define as:     A. Recurrent episodes of binge eating. An episode of binge eating is characterized by both of the following:?
[A]:
binge eating