Disambiguation evidence for Duchy of Prussia via surface form

"Brandenburg-Prussia received full sovereignty over the Duchy of Prussia"

Triples (1)

Triples where some other subject referred to this entity as "Brandenburg-Prussia received full sovereignty over the Duchy of Prussia".

Treaty of Oliva → includedClause →
"Brandenburg-Prussia received full sovereignty over the Duchy of Prussia"
↳ resolves to Duchy of Prussia
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