character: Richard Trevithick
topic: Early Steam Engines
grade: 3
subject: History
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character: James Watt
topic: Improvements to Steam Engines
grade: 3
subject: History
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character: George Stephenson
topic: Locomotives and Railways
grade: 3
subject: History
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character: Thomas Newcomen
topic: The First Steam Engine
grade: 3
subject: History
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