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, as the first chairman of the British Rail Board, infamously directed the huge reduction in railway lines across the UK in the 1960s?
[EX A]: british railways board

[EX Q]: Who played the title role in Bram Stoker's Dracula (1992)?
[EX A]:
dracula