character: Bulgaria
topic: Bulgaria's Alliance with the Central Powers
grade: 4
subject: History
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character: Central Powers
topic: Alliances in World War I
grade: 4
subject: History
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character: Germany
topic: Role of Germany in the Central Powers
grade: 4
subject: History
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character: Ottoman Empire
topic: The Ottoman Empire and its allies during WWI
grade: 4
subject: History
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