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: Anna Mstislavna of Novgorod | Statement: [Leo I of Galicia, mother, Anna Mstislavna of Novgorod]

Target entity: Anna Mstislavna of Novgorod
Context triple: [Leo I of Galicia, mother, Anna Mstislavna of Novgorod]

• A. Olga of Kiev
  Olga of Kiev was a 10th-century regent of Kievan Rus' renowned for her ruthless vengeance against the Drevlians and later venerated as a saint for being one of the first prominent rulers in the region to convert to Christianity.
• B. Theodosia Igorevna of Ryazan
  Theodosia Igorevna of Ryazan was a 13th-century Rus' noblewoman and princess of Ryazan, best known as the mother of the famed prince and military leader Alexander Nevsky.
• C. Rotrude
  Rotrude was a Frankish princess of the Carolingian dynasty, best known as one of Charlemagne’s daughters who played a role in his diplomatic marriage negotiations.
• D. Ekaterina Dolgorukova
  Ekaterina Dolgorukova was a Russian noblewoman from the influential Dolgorukov family, best known as the fiancée of Emperor Peter II of Russia and a figure in early 18th-century court politics.
• E. Anna of Moscow
  Anna of Moscow was a Russian princess from the Grand Duchy of Moscow who became Byzantine empress consort through her marriage to Emperor John VIII Palaiologos.
• 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: Anna Mstislavna of Novgorod
Triple: [Leo I of Galicia, mother, Anna Mstislavna of Novgorod]

Anna Mstislavna of Novgorod was a 13th-century Rus' princess from the ruling house of Novgorod who became a prominent dynastic figure through her marriage into the Galician-Volhynian principality and as the mother of King Leo I of Galicia.

Target entity: Anna Mstislavna of Novgorod
Target entity description: Anna Mstislavna of Novgorod was a 13th-century Rus' princess from the ruling house of Novgorod who became a prominent dynastic figure through her marriage into the Galician-Volhynian principality and as the mother of King Leo I of Galicia.

• A. Olga of Kiev
  Olga of Kiev was a 10th-century regent of Kievan Rus' renowned for her ruthless vengeance against the Drevlians and later venerated as a saint for being one of the first prominent rulers in the region to convert to Christianity.
• B. Theodosia Igorevna of Ryazan
  Theodosia Igorevna of Ryazan was a 13th-century Rus' noblewoman and princess of Ryazan, best known as the mother of the famed prince and military leader Alexander Nevsky.
• C. Rotrude
  Rotrude was a Frankish princess of the Carolingian dynasty, best known as one of Charlemagne’s daughters who played a role in his diplomatic marriage negotiations.
• D. Ekaterina Dolgorukova
  Ekaterina Dolgorukova was a Russian noblewoman from the influential Dolgorukov family, best known as the fiancée of Emperor Peter II of Russia and a figure in early 18th-century court politics.
• E. Anna of Moscow
  Anna of Moscow was a Russian princess from the Grand Duchy of Moscow who became Byzantine empress consort through her marriage to Emperor John VIII Palaiologos.
• F. None of above. chosen