Problem: Heliotherapy is the therapeutic use of what?
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A: sunlight

Problem: By what name is the drug Drinamyl better known?
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A: purple heart

Problem: To within a year either way, in which year did the Mallard reach 126mph - a record for a steam loco?
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A: 1938

Problem: """Poison arrow"" or ""poison dart"" is what type of creature?"
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A:
frog