character: George Westinghouse
topic: Support for Tesla's Alternating Current System
grade: 2
subject: History
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character: Nikola Tesla
topic: Inventor of the Alternating Current system
grade: 2
subject: History
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character: Thomas Edison
topic: Proponent of Direct Current system
grade: 2
subject: History
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character: Henry Adams
topic: Influence on the Electrical Revolution
grade: 2
subject: History
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