character: Alexander Graham Bell
topic: Inventions in Communication Technology
grade: 6
subject: Science
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character: Thomas Edison
topic: Early Innovations in Electrical Communication
grade: 6
subject: Science
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character: Guglielmo Marconi
topic: Development of Radio Communication
grade: 6
subject: Science
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character: Nikola Tesla
topic: Advancements in Wireless Communication
grade: 6
subject: Science
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