character: Cornelius Vanderbilt
topic: The Railroad Barons
grade: 2
subject: History
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character: John D. Rockefeller
topic: The Oil Industry
grade: 2
subject: History
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character: Andrew Carnegie
topic: Steel Production
grade: 2
subject: History
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character: George Pullman
topic: Luxury Railcars
grade: 2
subject: History
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