Problem: Who was the first person known to have died from the effects of radiation
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A: marie curie

Problem: Who is the Earl of Merioneth
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A: prince philip

Problem: What is the bottom of a sea or river called?
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A: bed

Problem: Which hero of several Arthur Conan Doyle stories was first introduced in the novel 'The Lost World' in 1912?
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A:
professor challenger