character: Dr. Sarah Lee
topic: Types of Antibodies and Their Functions
grade: 11
subject: Science
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character: Dr. John Smith
topic: Overview of Immune System Components
grade: 11
subject: Science
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character: Ms. Emily Zhang
topic: Introduction to Immunology
grade: 11
subject: Science
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character: Mr. Alex Johnson
topic: Function and Structure of Immunoglobulins
grade: 11
subject: Science
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