Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
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Question: Who hosted Call My Bluff?

Answer: call my bluff


Question: Who is the only British Prime Minister to serve under 3 monarchs?

Answer: prime minister of the united kingdom


Question: Which BBC current affairs programme, the longest-running in the world, is 60 years old this year ?

Answer:
bbc