character: Professor John Smith
topic: Essential Nutrients for Strong Bones
grade: 11
subject: Science
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character: Dr. Mary Johnson
topic: Calcium's Role in Bone Density
grade: 11
subject: Science
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character: Coach Kevin Brown
topic: Importance of Vitamin D for Athletes
grade: 11
subject: Science
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character: Nutritional Expert Lisa White
topic: Impact of Magnesium on Bone Health
grade: 11
subject: Science
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