instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
The headquarters building of which government agency is known as 'The Doughnut' due to its shape?
answer:
the doughnut


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


question:
Great Aunt Ada Doom is a character in which novel by Stella Gibbons?
answer:

ada doom