character: Inca
topic: Quipu and Inca Record Keeping
grade: 3
subject: History
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character: Ancient Peruvians
topic: Use of Knotted Strings for Communication
grade: 3
subject: History
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character: Inca Empire
topic: History of Quipu and Its Importance
grade: 3
subject: History
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character: Historians
topic: Studying Inca Record Keeping Techniques
grade: 3
subject: History
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