character: Dr. Smith
topic: Types of White Blood Cells
grade: 9
subject: Science
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character: Dr. Johnson
topic: Immune System Overview
grade: 9
subject: Science
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character: Ms. Lee
topic: Functions of White Blood Cells
grade: 9
subject: Science
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character: Mr. Patel
topic: Blood Composition and Its Components
grade: 9
subject: Science
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