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

[Q]: What famous song from the film Butch Cassidy and the Sundance Kid won an Oscar for best song?
[A]: academy award for best original song


[Q]: Billy the Kid was a native of which US state?
[A]: billy


[Q]: The East River separates Long Island from which New York borough?
[A]:
east river