Problem: What is the more familiar name for vitamin B2 ?
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A: riboflavin

Problem: Who was the British General who died at the Battle of Coruna in 1809?
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A: sir john moore

Problem: Built 1406-1420 as a political HQ/palace, The Forbidden City is in?
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A: beijing

Problem: How many presidents have been assassinated?
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A:
four