character: Dr. Emily Johnson
topic: Ancient Civilizations and Their Use of Metals
grade: 9
subject: Chemistry
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character: Professor John Smith
topic: The Role of Copper in Ancient Civilizations
grade: 9
subject: Chemistry
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character: Dr. Sarah Lee
topic: Iron Age Innovations in Materials Science
grade: 9
subject: Chemistry
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character: Mr. David Brown
topic: The Alchemy of Metals in Ancient Cultures
grade: 9
subject: Chemistry
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