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 current Broadway musical has a Japanese therapist character called Christmas Eve?
[EX A]: christmas eve

[EX Q]: What name is given to the murder of 7 people as part of a Prohibition Era conflict between the South Side Italian gang led by Al Capone and the North Side Irish gang led by Bugs Moran in Chicago, Illinois, in 1929?
[EX A]:
bugs moran