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

In which war was the Battle of Bunker Hill?
battle of bunker hill

Which comedian starred in the ABC sitcom Chicken Soup?
chicken soup

Buckey O'Neill Cabin, Kolb Studio, El Tovar Hotel, Hopi House, Verkamp's Curios, Lookout Studio, Desert View Watchtower and Bright Angel Lodge are historical buildings located at which tourist destination?

el tovar hotel