character: John A. Roebling
topic: Innovations in suspension bridge design
grade: 8
subject: History
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character: John A. Roebling
topic: Brooklyn Bridge construction techniques
grade: 8
subject: History
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character: John A. Roebling
topic: Impact of suspension bridges on transportation
grade: 8
subject: History
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character: John A. Roebling
topic: Early life and education of John A. Roebling
grade: 8
subject: History
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