instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
In May 1940, who became British Prime Minister after the resignation of Neville Chamberlain?
answer:
prime minister of the united kingdom

question:
Field Marshal Arthur Wellesley, shares his better known title with which Southern Hemisphere capital city?
answer:
arthur wellesley, 1st duke of wellington

question:
Who became British Prime Minister in October 1809?
answer:
prime minister of the united kingdom