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

[EX Q]: Who composed 'Belshazzar's Feast' cantata?
[EX A]: belshazzar's feast

[EX Q]: What currency is used on Christmas Island?
[EX A]: christmas island

[EX Q]: In the Bible who was the father of Abraham?
[EX A]:
abraham