character: Zhang Qian
topic: Explorer who helped expand trade
grade: 4
subject: Social Studies
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character: Marco Polo
topic: Famous traveler who explored Asia and contributed to trade
grade: 4
subject: Social Studies
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character: Ibn Battuta
topic: Explorer known for traveling across Africa and Asia, enhancing trade routes
grade: 4
subject: Social Studies
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character: Christopher Columbus
topic: Explorer who opened up trade routes between Europe and the Americas
grade: 4
subject: Social Studies
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