Problem: Which rank in the Royal Navy is equivalent to that of brigadier in the Army?
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A: commodore

Problem: In an opera by Wagner, which eponymous group held a song contest, the prize being the hand of 'Eva'?
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A: meistersingers

Problem: Hong Kong was ceded to Britain by the 'Treaty of Nanking', which ended which war that had lasted from 1839 - 1842?
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A: opium war

Problem: If dogs are canine, what are cattle?
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A:
bovine