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

[EX Q]: Which actor spoke the line I love the smell of napalm in the morning* in the 1979 film Apocalypse Now?
[EX A]: apocalypse now

[EX Q]: Who married Brooke Shields in 1997?
[EX A]: brooke shields

[EX Q]: What is the most popular breed of dog in the United States?
[EX A]:
dog