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: Treaty of Montgomery (1218 arrangements often associated with his supremacy) | Statement: [Llywelyn the Great, treaty, Treaty of Montgomery (1218 arrangements often associated with his supremacy)]

Target entity: Treaty of Montgomery (1218 arrangements often associated with his supremacy)
Context triple: [Llywelyn the Great, treaty, Treaty of Montgomery (1218 arrangements often associated with his supremacy)]

• A. Treaty of Salisbury (1289)
  The Treaty of Salisbury (1289) was a medieval diplomatic agreement between Scotland and England that helped set the terms for the proposed marriage of Margaret, the Maid of Norway, to Edward of Caernarfon and shaped the succession to the Scottish throne.
• B. Treaty of Montreuil (1299)
  The Treaty of Montreuil (1299) was a diplomatic agreement between England and France that helped ease longstanding hostilities by arranging a royal marriage alliance and redefining territorial claims.
• C. Treaty of Northampton (1290)
  The Treaty of Northampton (1290) was a medieval Anglo-Scottish agreement associated with the diplomatic arrangements surrounding the proposed marriage of Margaret, Maid of Norway, and efforts to secure the Scottish succession and peace between the two kingdoms.
• D. Treaty of Windsor (1175)
  The Treaty of Windsor (1175) was an agreement between England’s King Henry II and the Irish High King Ruaidrí Ua Conchobair that formalized English overlordship in Ireland while recognizing Ruaidrí’s authority over much of the island.
• E. Treaty of Newcastle (1334)
  The Treaty of Newcastle (1334) was an agreement during the Second War of Scottish Independence in which the exiled King Edward Balliol ceded large parts of southern Scotland to England, significantly undermining Scottish sovereignty.
• 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: Treaty of Montgomery (1218 arrangements often associated with his supremacy)
Triple: [Llywelyn the Great, treaty, Treaty of Montgomery (1218 arrangements often associated with his supremacy)]

The Treaty of Montgomery (1218 arrangements often associated with his supremacy) was a pivotal agreement that consolidated Llywelyn the Great’s dominance in Wales by formally recognizing and extending his authority over other Welsh rulers.

Target entity: Treaty of Montgomery (1218 arrangements often associated with his supremacy)
Target entity description: The Treaty of Montgomery (1218 arrangements often associated with his supremacy) was a pivotal agreement that consolidated Llywelyn the Great’s dominance in Wales by formally recognizing and extending his authority over other Welsh rulers.

• A. Treaty of Salisbury (1289)
  The Treaty of Salisbury (1289) was a medieval diplomatic agreement between Scotland and England that helped set the terms for the proposed marriage of Margaret, the Maid of Norway, to Edward of Caernarfon and shaped the succession to the Scottish throne.
• B. Treaty of Montreuil (1299)
  The Treaty of Montreuil (1299) was a diplomatic agreement between England and France that helped ease longstanding hostilities by arranging a royal marriage alliance and redefining territorial claims.
• C. Treaty of Northampton (1290)
  The Treaty of Northampton (1290) was a medieval Anglo-Scottish agreement associated with the diplomatic arrangements surrounding the proposed marriage of Margaret, Maid of Norway, and efforts to secure the Scottish succession and peace between the two kingdoms.
• D. Treaty of Windsor (1175)
  The Treaty of Windsor (1175) was an agreement between England’s King Henry II and the Irish High King Ruaidrí Ua Conchobair that formalized English overlordship in Ireland while recognizing Ruaidrí’s authority over much of the island.
• E. Treaty of Newcastle (1334)
  The Treaty of Newcastle (1334) was an agreement during the Second War of Scottish Independence in which the exiled King Edward Balliol ceded large parts of southern Scotland to England, significantly undermining Scottish sovereignty.
• F. None of above. chosen