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

[EX Q]: What style of facial hair was famously worn by American Civil War general Ambrose Burnside?
[EX A]: ambrose burnside

[EX Q]: Who in the 1930's wrote the novel 'Cakes And Ale'?
[EX A]: cakes and ale

[EX Q]: The second oldest ballpark in the Major Leagues, where do the Chicago Cubs play their home games?
[EX A]:
chicago cubs