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: [Duke of Brittany, officeHolder, John IV, Duke of Brittany]

Target entity: John IV, Duke of Brittany
Context triple: [Duke of Brittany, officeHolder, John IV, Duke of Brittany]

• A. 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.
• B. 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.
• C. 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.
• D. Conan IV, Duke of Brittany
  Conan IV, Duke of Brittany was a 12th-century Breton nobleman who ruled the Duchy of Brittany and became a key figure in the complex dynastic struggles between the Angevin kings of England and the French crown.
• E. Geoffrey II, Duke of Brittany
  Geoffrey II, Duke of Brittany was a 12th-century French nobleman, son of Henry II of England and brother of Richard the Lionheart, who ruled Brittany through his marriage to Constance and died young in a tournament accident.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"

Entity: John IV, Duke of Brittany
Triple: [Duke of Brittany, officeHolder, John IV, Duke of Brittany]

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.

Target entity: John IV, Duke of Brittany
Target entity description: 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.

• A. 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.
• B. 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.
• C. 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.
• D. Conan IV, Duke of Brittany
  Conan IV, Duke of Brittany was a 12th-century Breton nobleman who ruled the Duchy of Brittany and became a key figure in the complex dynastic struggles between the Angevin kings of England and the French crown.
• E. Geoffrey II, Duke of Brittany
  Geoffrey II, Duke of Brittany was a 12th-century French nobleman, son of Henry II of England and brother of Richard the Lionheart, who ruled Brittany through his marriage to Constance and died young in a tournament accident.
• F. None of above. chosen