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

[Q]: Allopurinol is typically prescribed for which illness?
[A]: allopurinol


[Q]: The bells were ringing for Chuck Berry when this song made it to No1. His first and only British No. 1. What song?
[A]: chuck berry


[Q]: What is Africa's 2nd-largest country, abbreviated to DRC?
[A]:
africa