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: Name Alfred Hitchcock's first sound film as director?

Answer: alfred hitchcock


Question: What is the name of the main thoroughfare in Barcelona, which runs from the Placa de Catalunya to the sea?

Answer: barcelona


Question: What is the name of the hero in the play Death of a Salesman?

Answer:
death of a salesman