character: Mr. John Doe
topic: Understanding White Blood Cells
grade: 9
subject: Science
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character: Dr. Emily Smith
topic: The Role of White Blood Cells in the Immune System
grade: 9
subject: Science
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character: Ms. Sarah Johnson
topic: Types of White Blood Cells and Their Functions
grade: 9
subject: Science
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character: Professor Mike Brown
topic: How White Blood Cells Respond to Infections
grade: 9
subject: Science
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