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: The wine-producing region of Hunter Valley is in which Australian state?

Answer: australia

Question: Which late 17th and early 18th century British architect designed Brighton Pavilion, Marble Arch, and the plan for London's Regents Park?

Answer: royal pavilion

Question: In which modern-day country was the Anglo-Boer war fought?

Answer:
second boer war