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

[Q]: In which US state would you find the cities of Chesapeake, Roanoke and Fredericksburg?
[A]: fredericksburg


[Q]: In which city was Christopher Columbus born?
[A]: columbus


[Q]: In the Bible who was the son of Abraham and Hagar?
[A]:
abraham