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

Which future Nobel Prize winner did Bill Clinton choose as his Vice President?
vice president of the united states

Who was the scheming wife of the Roman emperor Claudius?
claudius

What is the name in England for the mystery crime fiction board game devised by Anthony E. Pratt and originally published in 1949?

anthony e. pratt