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

What style of facial hair was famously worn by American Civil War general Ambrose Burnside?
ambrose burnside

Abyssinian, British Longhair and German Rex are all breeds of what?
british longhair

Eden Park staged some of the 2011 Rugby World Cup matches, in which city can it be found?

eden park