character: Mr. Sam Rivera
topic: Types of White Blood Cells and Their Functions
grade: 9
subject: Science
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character: Ms. Linda Johnson
topic: Immune System Overview
grade: 9
subject: Science
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character: Dr. Emily Chen
topic: The Role of Hemoglobin in Blood
grade: 9
subject: Science
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character: Mr. David Smith
topic: Basic Components of Blood
grade: 9
subject: Science
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