character: Mr. David Lee
topic: Understanding Blockchain Technology
grade: 10
subject: Computer Science
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character: Ms. Sarah Kim
topic: Introduction to Cryptography
grade: 10
subject: Computer Science
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character: Mr. John Smith
topic: Applications of Blockchain in Finance
grade: 10
subject: Computer Science
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character: Dr. Emily Chen
topic: Future of Decentralized Technologies
grade: 10
subject: Computer Science
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