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: Vortigern | Statement: [Historia Brittonum, mentions, Vortigern]

Target entity: Vortigern
Context triple: [Historia Brittonum, mentions, Vortigern]

• A. Vortigern
  Vortigern is the primary antagonist in the film "King Arthur: Legend of the Sword," depicted as a power-hungry ruler who usurps the throne through dark magic and treachery.
• B. King Leoric
  King Leoric is a tragic, maddened monarch from the Diablo video game series whose cursed reign and transformation into the Skeleton King haunt the town of Tristram.
• C. Aurelius Ambrosius
  Aurelius Ambrosius, better known as Ambrose of Milan, was a 4th-century bishop, influential Church Father, and one of the most important theologians and leaders of the early Western Christian Church.
• D. Aurelius Ambrosius
  Aurelius Ambrosius is a legendary British king in Arthurian tradition, often depicted as an early ruler and predecessor to Uther Pendragon and King Arthur.
• E. Cunobelinus
  Cunobelinus was a powerful early 1st-century CE king of the Catuvellauni tribe in southeastern Britain, often regarded as one of the most influential native rulers before the Roman conquest.
• 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: Vortigern
Triple: [Historia Brittonum, mentions, Vortigern]

Vortigern is a semi-legendary 5th-century British ruler often portrayed in medieval sources as the king whose invitation to Saxon mercenaries helped trigger the Anglo-Saxon settlement of Britain.

Target entity: Vortigern
Target entity description: Vortigern is a semi-legendary 5th-century British ruler often portrayed in medieval sources as the king whose invitation to Saxon mercenaries helped trigger the Anglo-Saxon settlement of Britain.

• A. Vortigern chosen
  Vortigern is the primary antagonist in the film "King Arthur: Legend of the Sword," depicted as a power-hungry ruler who usurps the throne through dark magic and treachery.
• B. King Leoric
  King Leoric is a tragic, maddened monarch from the Diablo video game series whose cursed reign and transformation into the Skeleton King haunt the town of Tristram.
• C. Aurelius Ambrosius
  Aurelius Ambrosius, better known as Ambrose of Milan, was a 4th-century bishop, influential Church Father, and one of the most important theologians and leaders of the early Western Christian Church.
• D. Aurelius Ambrosius
  Aurelius Ambrosius is a legendary British king in Arthurian tradition, often depicted as an early ruler and predecessor to Uther Pendragon and King Arthur.
• E. Cunobelinus
  Cunobelinus was a powerful early 1st-century CE king of the Catuvellauni tribe in southeastern Britain, often regarded as one of the most influential native rulers before the Roman conquest.
• F. None of above.