character: John A. Roebling
topic: Impact of suspension bridges on transportation
grade: 8
subject: History
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character: John A. Roebling
topic: Innovations in bridge engineering
grade: 8
subject: History
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character: Transportation History
topic: Evolution of infrastructure in the 19th century
grade: 8
subject: History
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character: Civil Engineering
topic: Significance of suspension bridge design
grade: 8
subject: History
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