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: Created by Alex Raymond, this futuristic character first appeared in 1934. Who is he?

Answer: alex raymond


Question: What is the largest country in Africa?

Answer: africa


Question: Bring on the Empty Horses was the sequel to which other David Niven Autobiography/Memoir ?

Answer:
david niven