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: John IV, Duke of Brittany | Statement: [War of the Breton Succession, successorRuler, John IV, Duke of Brittany]

Target entity: John IV, Duke of Brittany
Context triple: [War of the Breton Succession, successorRuler, John IV, Duke of Brittany]

• A. John IV, Duke of Brittany chosen
  John IV, Duke of Brittany was a 14th-century Breton nobleman whose turbulent reign was marked by the Breton War of Succession and complex alliances with both England and France during the Hundred Years’ War.
• B. John III, Duke of Brittany
  John III, Duke of Brittany was a 14th-century Breton ruler whose childless reign and succession disputes helped trigger the Breton War of Succession.
• C. John VI, Duke of Brittany
  John VI, Duke of Brittany was a late 14th- and early 15th-century Breton ruler known for consolidating ducal authority and navigating the complex politics between France and England during the Hundred Years’ War.
• D. John II, Duke of Brittany
  John II, Duke of Brittany was a 13th-century French nobleman who ruled the Duchy of Brittany and played a significant role in the politics of the Capetian kingdom.
• E. John I, Duke of Brittany
  John I, Duke of Brittany was a 13th-century Breton nobleman who ruled the Duchy of Brittany and played a significant role in the politics of medieval France.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.