character: Inca
topic: Machu Picchu and Its Significance
grade: 4
subject: Social Studies
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character: Machu Picchu
topic: History of the Incas
grade: 4
subject: Social Studies
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character: Inca Civilization
topic: Cultural Achievements
grade: 4
subject: Social Studies
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character: Archaeologists
topic: Discovering Machu Picchu
grade: 4
subject: Social Studies
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