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

[EX Q]: Devil's Tower National Monument in Wyoming, USA features prominently in which landmark 1977 science fiction film?
[EX A]: devils tower

[EX Q]: Which strong man appears in the Bible in the Book of Judges?
[EX A]: book of judges

[EX Q]: Named after the Greek words for good and sound, what is the valved brass tenor instrument resembling a small tuba?
[EX A]:
brass instrument