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

[Q]: Which was the title of the 7th and final book in the Chronicles of Narnia by C.S. Lewis?
[A]: the chronicles of narnia

[Q]: Who played the character Gene Hunt in the UK TV series 'Life on Mars' and 'Ashes to Ashes'?
[A]: life on mars

[Q]: In which town Is the administrative headquarters of Buckinghamshire?
[A]:
buckinghamshire