character: Bob
topic: Blockchain Technology Overview
grade: 10
subject: Computer Science
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character: Alice
topic: Introduction to Cryptography
grade: 10
subject: Computer Science
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character: Charlie
topic: Decentralized Finance (DeFi) Concepts
grade: 10
subject: Computer Science
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character: David
topic: Smart Contracts and Their Applications
grade: 10
subject: Computer Science
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