character: Alexander Graham Bell
topic: Inventing the Telephone
grade: 6
subject: Science
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character: Thomas Edison
topic: Electrical Communication Innovations
grade: 6
subject: Science
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character: Guglielmo Marconi
topic: Development of Wireless Communication
grade: 6
subject: Science
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character: Elisha Gray
topic: Contemporary of Bell in Telegraphy
grade: 6
subject: Science
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