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

Q: Who did boxer Floyd Patterson defeat to regain the Heavyweight Championship in June 1960?

A: boxing
****
Q: In which city was Christopher Columbus born?

A: columbus
****
Q: Raphanus Sativus is the Latin name of what vegetable, which has varieties including Cherry Belle, Sicily Giant and Daikon?

A:
daikon
****