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: Roger Mortimer, 1st Earl of March | Statement: [Isabella of France, partner, Roger Mortimer, 1st Earl of March]

Target entity: Roger Mortimer, 1st Earl of March
Context triple: [Isabella of France, partner, Roger Mortimer, 1st Earl of March]

• A. Thomas Beaufort, Duke of Exeter
  Thomas Beaufort, Duke of Exeter, was an early 15th-century English nobleman, military commander, and half-uncle of King Henry V who played a prominent role in the Hundred Years’ War and royal government.
• B. Edmund Crouchback, 1st Earl of Lancaster
  Edmund Crouchback, 1st Earl of Lancaster, was a 13th-century English prince and military leader who became a powerful noble through extensive landholdings and royal favor, founding the House of Lancaster.
• C. Edmund Tudor, Duke of Somerset
  Edmund Tudor, Duke of Somerset, was a short-lived English prince of the early Tudor dynasty, known primarily as the younger son of King Henry VII of England and Elizabeth of York.
• D. Henry of Grosmont
  Henry of Grosmont was a prominent 14th-century English nobleman, military commander, and statesman who became one of King Edward III’s most trusted lieutenants during the early phases of the Hundred Years’ War.
• E. Lionel of Antwerp, 1st Duke of Clarence
  Lionel of Antwerp, 1st Duke of Clarence, was a 14th-century English prince and nobleman whose lineage played a key role in the later Wars of the Roses through the Yorkist claim to the throne.
• 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: Roger Mortimer, 1st Earl of March
Triple: [Isabella of France, partner, Roger Mortimer, 1st Earl of March]

Roger Mortimer, 1st Earl of March, was a powerful 14th-century English nobleman who led the rebellion against King Edward II and effectively ruled England during the early reign of Edward III before being overthrown and executed.

Target entity: Roger Mortimer, 1st Earl of March
Target entity description: Roger Mortimer, 1st Earl of March, was a powerful 14th-century English nobleman who led the rebellion against King Edward II and effectively ruled England during the early reign of Edward III before being overthrown and executed.

• A. Thomas Beaufort, Duke of Exeter
  Thomas Beaufort, Duke of Exeter, was an early 15th-century English nobleman, military commander, and half-uncle of King Henry V who played a prominent role in the Hundred Years’ War and royal government.
• B. Edmund Crouchback, 1st Earl of Lancaster
  Edmund Crouchback, 1st Earl of Lancaster, was a 13th-century English prince and military leader who became a powerful noble through extensive landholdings and royal favor, founding the House of Lancaster.
• C. Edmund Tudor, Duke of Somerset
  Edmund Tudor, Duke of Somerset, was a short-lived English prince of the early Tudor dynasty, known primarily as the younger son of King Henry VII of England and Elizabeth of York.
• D. Henry of Grosmont
  Henry of Grosmont was a prominent 14th-century English nobleman, military commander, and statesman who became one of King Edward III’s most trusted lieutenants during the early phases of the Hundred Years’ War.
• E. Lionel of Antwerp, 1st Duke of Clarence
  Lionel of Antwerp, 1st Duke of Clarence, was a 14th-century English prince and nobleman whose lineage played a key role in the later Wars of the Roses through the Yorkist claim to the throne.
• F. None of above. chosen