character: Professor Lee
topic: Dietary Sources of Calcium
grade: 11
subject: Science
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character: Student A
topic: Importance of Calcium in Bone Health
grade: 11
subject: Science
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character: Nutritionist Kim
topic: Calcium Absorption and Vitamin D
grade: 11
subject: Science
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character: Doctor Chen
topic: Consequences of Calcium Deficiency
grade: 11
subject: Science
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