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

[EX Q]: What is the name of the astromech droid companion of Anakin Skywalker, Luke Skywalker and Obi-Wan Kenobi in the Star Wars franchise?
[EX A]: droid

[EX Q]: Who succeeded Henry Cooper as British Heavyweight Boxing Champion?
[EX A]: boxing

[EX Q]: In what city would you find Copacabana beach?
[EX A]:
copacabana, rio de janeiro