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

[EX Q]: In which US state are the Catskill Mountains?
[EX A]: catskill mountains

[EX Q]: What is the title of the four-episode special of 'Doctor Who', made for the Red Nose Day telethon in the UK, broadcast in March 1999?
[EX A]: doctor who

[EX Q]: Which `J` is the book of the Bible immediately follows Deuteronomy?
[EX A]:
bible