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

[EX Q]: Formerly known as Sky Dome, Rogers Centre is home to what American League baseball team, the only MLB team located outside the United States?
[EX A]: american league

[EX Q]: Auld Reekie is the nickname for which Scottish city?
[EX A]: auld reekie

[EX Q]: Which guitarist had a 1968 hit with the self-penned instrumental Classical Gas?
[EX A]:
classical gas