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

[EX Q]: Formerly known as Sky Dome, Rogers Centre is home to what American League baseball team, the only MLB team located outside the United States?
[EX A]: american league

[EX Q]: In 1864, the Dale Dyke Dam burst while being filled, leading to the death of 240 people in which British city?
[EX A]: dale dike reservoir

[EX Q]: Who was Britain's first Labour prime minister?
[EX A]:
britain