character: Isambard Kingdom Brunel
topic: Development of Iron Bridges
grade: 8
subject: History
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character: John A. Roebling
topic: Brooklyn Bridge and Iron Infrastructure
grade: 8
subject: History
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character: Thomas Telford
topic: Engineering Innovations with Iron
grade: 8
subject: History
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character: William Hartley
topic: Impact of Iron Structures on Urban Development
grade: 8
subject: History
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