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

[EX Q]: Which river begins in the Rocky Mountains in south-west Colorado, crosses New Mexico and forms the border between Mexico and the USA before reaching the Gulf of Mexico?
[EX A]: new mexico

[EX Q]: Who was British Prime Minister from 1922-23, shortly before he died?
[EX A]: prime minister of the united kingdom

[EX Q]: At the 1908 Olympic Games, City of London Police defeated Liverpool Polce to win gold - at what event?
[EX A]:
1908 summer olympics