character: Dr. Alex Thomson
topic: The Role of Catalysts in Chemical Reactions
grade: 9
subject: Science
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character: Ms. Sarah Lee
topic: Catalysts in Everyday Products
grade: 9
subject: Science
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character: Mr. John Black
topic: The Importance of Catalysts in the Fuel Industry
grade: 9
subject: Science
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character: Dr. Emily Zhang
topic: Industrial Applications of Catalysts in Manufacturing
grade: 9
subject: Science
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