character: Nikola Tesla
topic: Alternating Current
grade: 12
subject: History
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character: Thomas Edison
topic: Direct Current vs. Alternating Current
grade: 12
subject: History
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character: George Westinghouse
topic: AC Power Systems
grade: 12
subject: History
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character: Henry Morton Stanley
topic: Tesla's Impact on Modern Electricity
grade: 12
subject: History
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