character: Mr. James Lin
topic: Understanding Nutrients for Bone Strength
grade: 9
subject: Science
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character: Dr. Sarah Wallace
topic: The Role of Calcium in Bone Development
grade: 9
subject: Science
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character: Professor Emily Tran
topic: Vitamin D and Its Impact on Bone Health
grade: 9
subject: Science
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character: Mr. David Smith
topic: Exercise and Its Effect on Bone Density
grade: 9
subject: Science
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