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: Mathilda Coster Mortimer | Statement: [Ian Campbell, 11th Duke of Argyll, spouse, Mathilda Coster Mortimer]

Target entity: Mathilda Coster Mortimer
Context triple: [Ian Campbell, 11th Duke of Argyll, spouse, Mathilda Coster Mortimer]

• A. Maud Mortimer
  Maud Mortimer was a medieval English noblewoman of the powerful Mortimer family, known primarily as the daughter of Roger Mortimer, 1st Earl of March.
• B. Beatrice Mortimer
  Beatrice Mortimer was a 14th-century English noblewoman, daughter of the powerful Roger Mortimer, 1st Earl of March, and a member of the influential Mortimer family during the reign of Edward II and Edward III.
• C. Gertrude Vernon
  Gertrude Vernon, better known as Lady Agnew of Lochnaw, is chiefly remembered as the elegant sitter in John Singer Sargent’s famous 1892 portrait that bears her title.
• D. Agnes Mortimer
  Agnes Mortimer was a 14th-century English noblewoman of the powerful Mortimer family, notable for her dynastic connections within the medieval English aristocracy.
• E. Louise Mortimer
  Louise Mortimer was the mother of French Socialist politician and former Prime Minister Laurent Fabius.
• 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: Mathilda Coster Mortimer
Triple: [Ian Campbell, 11th Duke of Argyll, spouse, Mathilda Coster Mortimer]

Mathilda Coster Mortimer was an American-born socialite who became a Scottish duchess through her marriage into the Campbell family, holders of the Dukedom of Argyll.

Target entity: Mathilda Coster Mortimer
Target entity description: Mathilda Coster Mortimer was an American-born socialite who became a Scottish duchess through her marriage into the Campbell family, holders of the Dukedom of Argyll.

• A. Maud Mortimer
  Maud Mortimer was a medieval English noblewoman of the powerful Mortimer family, known primarily as the daughter of Roger Mortimer, 1st Earl of March.
• B. Beatrice Mortimer
  Beatrice Mortimer was a 14th-century English noblewoman, daughter of the powerful Roger Mortimer, 1st Earl of March, and a member of the influential Mortimer family during the reign of Edward II and Edward III.
• C. Gertrude Vernon
  Gertrude Vernon, better known as Lady Agnew of Lochnaw, is chiefly remembered as the elegant sitter in John Singer Sargent’s famous 1892 portrait that bears her title.
• D. Agnes Mortimer
  Agnes Mortimer was a 14th-century English noblewoman of the powerful Mortimer family, notable for her dynastic connections within the medieval English aristocracy.
• E. Louise Mortimer
  Louise Mortimer was the mother of French Socialist politician and former Prime Minister Laurent Fabius.
• F. None of above. chosen