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

[Q]: Which English classic horse race for 3 year olds held at Doncaster every September began in 1776?
[A]: doncaster racecourse


[Q]: Which former Portuguese African Colony joined the British Commonwealth in 1995?
[A]: commonwealth of nations


[Q]: What position in the U.S. government has been held by Hillary Clinton, Colin Powell, and Henry Kissinger?
[A]:
hillary clinton