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

[Q]: Whitney Houston's husband Bobby Brown was originally a member of which successful band?
[A]: bobby brown

[Q]: The 1987 film 'Roxanne' was adapted by actor Steve Martin from which Edmond Rostand play?
[A]: roxanne

[Q]: What position in the U.S. government has been held by Hillary Clinton, Colin Powell, and Henry Kissinger?
[A]:
hillary clinton