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

[Q]: What is the second book of the Bible?
[A]: bible


[Q]: The Byzantine Empire is the term used since the 19th century to describe the Roman Empire of the Middle Ages, centred on its capital, where?
[A]: byzantine empire


[Q]: On which island is Nassau, the capital of the Bahamas?
[A]:
nassau