Problem: In the game of billiards, what colour are the spots on the spot balls?
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A: black

Problem: "Which US president was re-elected with the slogan ""Don't change horses in mid-stream""?"
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A: abraham lincoln

Problem: Name the 19th century American artist famous for his illustrated book 'The Birds of America'.
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A: john j audubon

Problem: Which board game includes a swinging boot, a bucket, a bath tub and a seesaw?
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A:
mouse trap