character: Dr. Helen Carter
topic: The Role of Calcium in Bone Health
grade: 9
subject: Science
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character: Dr. Susan Mitchell
topic: The Importance of Vitamin D for Bone Density
grade: 9
subject: Science
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character: Professor James Lee
topic: How Exercise Affects Bone Strength
grade: 9
subject: Science
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character: Dr. Emily Tran
topic: Nutrition and Its Impact on Bone Health
grade: 9
subject: Science
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