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

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


[Q]: In which city will the 2014 Tour de France begin?
[A]: 2014 tour de france


[Q]: Which cartoon series relies on the voices of Seth MacFarlane, Alex Borstein, Seth Green, Mila Kunis & Mike Henry?
[A]:
mila kunis