character: Russia
topic: Allegiance with Serbia against Austria-Hungary
grade: 9
subject: History
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character: Serbia
topic: Alliance with Russia in the Balkans
grade: 9
subject: History
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character: Austria-Hungary
topic: Conflict with Serbia and its implications on Russia
grade: 9
subject: History
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character: Europe
topic: Political tensions leading to World War I
grade: 9
subject: History
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