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

In May 1940, who became British Prime Minister after the resignation of Neville Chamberlain?
prime minister of the united kingdom

Who starred in and directed the 1993 film A Bronx Tale?
a bronx tale

In which country does 100 Xu equal 1 Dong?

vietnamese dong