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

[EX Q]: Who plays Dr Evil the nemesis of Austin Powers in the Austin Powers series of films?
[EX A]: austin powers

[EX Q]: What is the French name for the English Channel?
[EX A]: channel

[EX Q]: Which vocalist has sung with both Deep Purple and Black Sabbath?
[EX A]:
black sabbath