character: George Westinghouse
topic: Electrical Power Distribution
grade: 3
subject: History
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character: Thomas Edison
topic: Electricity and Early Power Systems
grade: 3
subject: History
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character: Nikola Tesla
topic: Alternating Current vs. Direct Current
grade: 3
subject: History
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character: Henry Ford
topic: The Impact of Electricity on Industry
grade: 3
subject: History
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