character: Machu Picchu
topic: Architecture and Engineering of the Inca
grade: 3
subject: History
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character: The Inca Empire
topic: History of the Inca Civilization
grade: 3
subject: History
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character: Intihuatana Stone
topic: Significance of Sacred Structures
grade: 3
subject: History
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character: Inca Roads
topic: Engineering Feats of Inca Transportation
grade: 3
subject: History
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