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

Devil's Tower National Monument in Wyoming, USA features prominently in which landmark 1977 science fiction film?
devils tower

Chris Martin is the lead singer with which band who had several hits in the 2000s?
chris martin

In 2008 government in Bhutan was changed from an absolute monarchy to what?

bhutan