character: Dr. Robert Lee
topic: The Role of Bacteria in Nutrient Cycling in Soil
grade: 9
subject: Geography
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character: Professor Jane Smith
topic: Soil Composition and Microorganisms
grade: 9
subject: Geography
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character: Dr. Emily Chen
topic: The Impact of Soil Bacteria on Ecosystem Health
grade: 9
subject: Geography
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character: Mr. Tom Johnson
topic: Nutrient Cycling and Soil Fertility
grade: 9
subject: Geography
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