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: Robert, 1st Earl of Gloucester | Statement: [Sybil, illegitimate daughter of Henry I of England, relative, Robert, 1st Earl of Gloucester]

Target entity: Robert, 1st Earl of Gloucester
Context triple: [Sybil, illegitimate daughter of Henry I of England, relative, Robert, 1st Earl of Gloucester]

• A. 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.
• B. William FitzRobert, 2nd Earl of Gloucester
  William FitzRobert, 2nd Earl of Gloucester, was a prominent 12th-century Anglo-Norman nobleman and feudal magnate who held extensive lands in England and Wales and played a significant role in the politics of the reigns of Kings Stephen and Henry II.
• C. William Douglas, 2nd Earl of March
  William Douglas, 2nd Earl of March, was an 18th-century Scottish nobleman and politician from the influential Douglas family, whose titles and estates later passed to his son, the 4th Duke of Queensberry.
• D. John Beaufort, 1st Earl of Somerset
  John Beaufort, 1st Earl of Somerset, was an English nobleman and legitimized son of John of Gaunt whose descendants played a key role in the Wars of the Roses and the rise of the Tudor dynasty.
• E. 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.
• 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: Robert, 1st Earl of Gloucester
Triple: [Sybil, illegitimate daughter of Henry I of England, relative, Robert, 1st Earl of Gloucester]

Robert, 1st Earl of Gloucester was a powerful 12th-century Anglo-Norman nobleman and military leader, best known as a key supporter of Empress Matilda during the civil war known as The Anarchy.

Target entity: Robert, 1st Earl of Gloucester
Target entity description: Robert, 1st Earl of Gloucester was a powerful 12th-century Anglo-Norman nobleman and military leader, best known as a key supporter of Empress Matilda during the civil war known as The Anarchy.

• A. 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.
• B. William FitzRobert, 2nd Earl of Gloucester
  William FitzRobert, 2nd Earl of Gloucester, was a prominent 12th-century Anglo-Norman nobleman and feudal magnate who held extensive lands in England and Wales and played a significant role in the politics of the reigns of Kings Stephen and Henry II.
• C. William Douglas, 2nd Earl of March
  William Douglas, 2nd Earl of March, was an 18th-century Scottish nobleman and politician from the influential Douglas family, whose titles and estates later passed to his son, the 4th Duke of Queensberry.
• D. John Beaufort, 1st Earl of Somerset
  John Beaufort, 1st Earl of Somerset, was an English nobleman and legitimized son of John of Gaunt whose descendants played a key role in the Wars of the Roses and the rise of the Tudor dynasty.
• E. 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.
• F. None of above. chosen