character: Thomas Edison
topic: Electricity and Innovation
grade: 9
subject: History
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character: Nikola Tesla
topic: Rivalry in Electrical Innovation
grade: 9
subject: History
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character: George Westinghouse
topic: Development of AC Electrical Systems
grade: 9
subject: History
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character: Alexander Graham Bell
topic: Telecommunication Innovations
grade: 9
subject: History
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