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

[EX Q]: What nationality was Che Guevara?
[EX A]: che guevara

[EX Q]: Barabas is the central character in what 16th century play?
[EX A]: barabas

[EX Q]: Which US horse race for three year-old thoroughbred horses is held on the first Saturday in May, over one and a quarter miles (2 km) at Churchill Downs?
[EX A]:
churchill downs