Triple

Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).

Phrase: Duchy of Prussia | Statement: [Joachim Frederick, Elector of Brandenburg, territoryRuled, Duchy of Prussia]

Target entity: Duchy of Prussia
Context triple: [Joachim Frederick, Elector of Brandenburg, territoryRuled, Duchy of Prussia]

• A. Duchy of Prussia chosen
  The Duchy of Prussia was a 16th–18th century secular duchy in northeastern Europe, ruled by the Hohenzollerns, that formed the core of the later Kingdom of Prussia.
• B. Royal Prussia
  Royal Prussia was a semi-autonomous province of the Kingdom of Poland on the Baltic coast, historically significant as a prosperous Hanseatic region and the homeland of astronomer Nicolaus Copernicus.
• C. Brandenburg-Prussia
  Brandenburg-Prussia was an early modern German state that emerged from the union of the Margraviate of Brandenburg and the Duchy of Prussia, forming the core of what later became the Kingdom of Prussia.
• D. Duchy of Pomerania
  The Duchy of Pomerania was a medieval and early modern feudal state on the southern coast of the Baltic Sea, ruled by the House of Griffins and situated in what is now northern Poland and northeastern Germany.
• E. Margraviate of Brandenburg
  The Margraviate of Brandenburg was a major principality of the Holy Roman Empire that became the core territory of the later Kingdom of Prussia and a key power in northern Germany.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.