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: Mstislav Danylovych | Statement: [Danylo of Halych, child, Mstislav Danylovych]

Target entity: Mstislav Danylovych
Context triple: [Danylo of Halych, child, Mstislav Danylovych]

• A. Sviatoslav Olgovich
  Sviatoslav Olgovich was a 12th-century prince from the Olgovichi branch of the Rurikid dynasty who ruled in parts of Kievan Rus' and took part in its dynastic conflicts.
• B. Vsevolod II of Kiev
  Vsevolod II of Kiev was a 12th-century Grand Prince of Kiev from the Olgovichi branch of the Rurikid dynasty, known for his role in the complex dynastic struggles of Kievan Rus'.
• C. Oleg Sviatoslavich
  Oleg Sviatoslavich was a medieval prince of the Rurikid dynasty who ruled over Chernigov and played a significant role in the complex dynastic struggles of Kievan Rus'.
• D. Sviatoslavichi of Chernigov
  The Sviatoslavichi of Chernigov were a medieval Rurikid princely lineage that ruled the Principality of Chernigov and played a major role in the politics of Kievan Rus'.
• E. Vladimir II Monomakh
  Vladimir II Monomakh was a Grand Prince of Kievan Rus' renowned for his military leadership, efforts to unify the realm, and authorship of the moral treatise "Instruction."
• 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: Mstislav Danylovych
Triple: [Danylo of Halych, child, Mstislav Danylovych]

Mstislav Danylovych was a medieval Ruthenian prince from the ruling dynasty of the Kingdom of Galicia–Volhynia, known primarily as a son of King Danylo of Halych.

Target entity: Mstislav Danylovych
Target entity description: Mstislav Danylovych was a medieval Ruthenian prince from the ruling dynasty of the Kingdom of Galicia–Volhynia, known primarily as a son of King Danylo of Halych.

• A. Sviatoslav Olgovich
  Sviatoslav Olgovich was a 12th-century prince from the Olgovichi branch of the Rurikid dynasty who ruled in parts of Kievan Rus' and took part in its dynastic conflicts.
• B. Vsevolod II of Kiev
  Vsevolod II of Kiev was a 12th-century Grand Prince of Kiev from the Olgovichi branch of the Rurikid dynasty, known for his role in the complex dynastic struggles of Kievan Rus'.
• C. Oleg Sviatoslavich
  Oleg Sviatoslavich was a medieval prince of the Rurikid dynasty who ruled over Chernigov and played a significant role in the complex dynastic struggles of Kievan Rus'.
• D. Sviatoslavichi of Chernigov
  The Sviatoslavichi of Chernigov were a medieval Rurikid princely lineage that ruled the Principality of Chernigov and played a major role in the politics of Kievan Rus'.
• E. Vladimir II Monomakh
  Vladimir II Monomakh was a Grand Prince of Kievan Rus' renowned for his military leadership, efforts to unify the realm, and authorship of the moral treatise "Instruction."
• F. None of above. chosen