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

[Q]: Chris Martin is the lead vocalist and rhythm guitarist with which group?
[A]: chris martin

[Q]: Who is the only British Prime Minister to serve under 3 monarchs?
[A]: prime minister of the united kingdom

[Q]: In which county of Ireland would you find Blarney Castle, home of the Blarney Stone?
[A]:
blarney castle