Problem: Marie Curie named which element in homage to her homeland?
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A: polonium

Problem: What branch of medicine deals with the cause, origin and nature of disease?
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A: pathology

Problem: What name links Spain's oldest university (dating to 1218) and an 1812 battle involving the Duke of Wellington?
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A: salamanca

Problem: The cities of Philadelphia, Pittsburgh, Allentown, Erie, Reading, Scranton, Bethlehem, Altoona and Harrisburg are in which US state?
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A:
pennsylvania