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: Field Marshal Arthur Wellesley, shares his better known title with which Southern Hemisphere capital city?

Answer: arthur wellesley, 1st duke of wellington


Question: Which 20th century British prime minister had the longest surname ?

Answer: prime minister of the united kingdom


Question: The Clair de Lune is a popular work by which composer?

Answer:
suite bergamasque