character: John Smith
topic: Effects of Cardiovascular Exercise on Heart Health
grade: 11
subject: Science
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character: Sarah Johnson
topic: The Importance of Regular Exercise
grade: 11
subject: Science
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character: Mark Lee
topic: Understanding Heart Rate and Exercise
grade: 11
subject: Science
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character: Emily Davis
topic: Cardiovascular Health and Fitness Benefits
grade: 11
subject: Science
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