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

Q: Who was the only boxer to win a world title without ever having a manager?

A: boxing
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Q: Alejandro Amaya, Carlos Arruza, Jaime Bravo and Carmelo Torres are famous Mexican?

A: alejandro amaya
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Q: Ann Rules book The Stranger Beside Me, is about what serial killer, assumed to have murdered 35 people, before hitting the electric chair in Starke, Florida on January 24, 1989?

A:
the stranger beside me
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