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

[EX Q]: Between 1958 and 1972 all Cliff Richard single records were released on which record label?
[EX A]: cliff richard

[EX Q]: What American swimmer won eight gold medals at the 2008 Olympics?
[EX A]: 2008 summer olympics

[EX Q]: What is the SI base unit of electrical current?
[EX A]:
electric current