instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Who was Prime Minister of Australia at the outbreak of World War I?
answer:
australia


question:
Who was the scheming wife of the Roman emperor Claudius?
answer:
claudius


question:
Ben Gurion International Airport is in which country?
answer:

ben gurion airport