character: Pachacuti Inca Yupanqui
topic: Innovations in Incan Architecture
grade: 10
subject: History
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character: Machu Picchu
topic: Significance of Stone Construction
grade: 10
subject: History
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character: Sacsayhuamán
topic: Engineering Techniques in Incan Walls
grade: 10
subject: History
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character: Incan Builders
topic: Construction Methods and Materials
grade: 10
subject: History
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