instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
In which book of the Bible are the Ten Commandments first mentioned?
answer:
bible


question:
Who married Brooke Shields in 1997?
answer:
brooke shields


question:
Who was British Prime Minister from 1955 to 1958?
answer:

prime minister of the united kingdom