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

[EX Q]: The headquarters building of which government agency is known as 'The Doughnut' due to its shape?
[EX A]: the doughnut

[EX Q]: Who played Lionel Hardcastle in the TV series 'As Time Goes By'?
[EX A]: as time goes by

[EX Q]: Delamere Forest is in which English county?
[EX A]:
delamere forest