Problem: What invention of Sir Ernest Swinton changed warfare for ever
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A: tank

Problem: Deriving from 'Tagalog' Austronesian language 'bundok' (mountain) the US-English word 'boondocks' (and 'boonies') refers disrespectfully to?
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A: remote rural area

Problem: Which vertical take-off jet made its first flight in 1966?
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A: harrier

Problem: With which sporting event of April 2012 do you associate Trenton Oldfield?
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A:
boat race