character: Professor Emily Zhang
topic: Nutrient Cycling in Coastal Waters
grade: 9
subject: Science
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character: Dr. Sarah Lee
topic: Impact of Coastal Eutrophication
grade: 9
subject: Science
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character: Mr. John Smith
topic: Marine Ecosystem Interactions
grade: 9
subject: Science
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character: Ms. Rachel Kim
topic: Role of Phytoplankton in Nutrient Cycling
grade: 9
subject: Science
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