character: Dr. Jason Lee
topic: Analyzing Water Contaminants
grade: 12
subject: Chemistry
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character: Dr. Emily Smith
topic: Chemical Properties of Water
grade: 12
subject: Chemistry
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character: Professor Mark Robinson
topic: Advanced Techniques in Water Testing
grade: 12
subject: Chemistry
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character: Dr. Sarah Johnson
topic: Environmental Impacts of Water Pollution
grade: 12
subject: Chemistry
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