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

[EX Q]: What was the first British credit card?
[EX A]: credit card

[EX Q]: Which Union leader of the American Civil War gave his name to a tree in California's 'Sequoia National Park'?
[EX A]: american civil war

[EX Q]: In which city could you visit the Anne Frank House?
[EX A]:
anne frank house