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: Monomakhovichi branch of Rurikids | Statement: [Mstislav I of Kiev, house, Monomakhovichi branch of Rurikids]

Target entity: Monomakhovichi branch of Rurikids
Context triple: [Mstislav I of Kiev, house, Monomakhovichi branch of Rurikids]

• A. Rurik dynasty
  The Rurik dynasty was the first ruling dynasty of Kievan Rus' and later Muscovy, traditionally traced to the Varangian prince Rurik and his descendants who governed much of Eastern Europe from the 9th to the 16th century.
• B. Vladimirovichi branch of the Romanov family
  The Vladimirovichi branch of the Romanov family was a prominent cadet line of the Russian imperial dynasty descended from Grand Duke Vladimir Alexandrovich, influential in late imperial politics and succession disputes.
• C. Romanovichi of Galicia–Volhynia
  The Romanovichi of Galicia–Volhynia were a medieval East Slavic ruling dynasty that governed the powerful Kingdom of Galicia–Volhynia in what is now western Ukraine and parts of Poland and Belarus.
• D. Gediminid dynasty
  The Gediminid dynasty was a powerful medieval ruling family that expanded the Grand Duchy of Lithuania into one of the largest states in Europe and provided monarchs to Lithuania, Poland, and other Eastern European realms.
• E. Yaroslavichi
  Yaroslavichi was the princely dynasty of the descendants of Yaroslav the Wise that ruled key principalities of Kievan Rus', including Chernigov.
• 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: Monomakhovichi branch of Rurikids
Triple: [Mstislav I of Kiev, house, Monomakhovichi branch of Rurikids]

The Monomakhovichi branch of the Rurikids was a powerful princely lineage in medieval Kievan Rus descended from Vladimir II Monomakh, which produced several prominent rulers of Kiev and other principalities.

Target entity: Monomakhovichi branch of Rurikids
Target entity description: The Monomakhovichi branch of the Rurikids was a powerful princely lineage in medieval Kievan Rus descended from Vladimir II Monomakh, which produced several prominent rulers of Kiev and other principalities.

• A. Rurik dynasty chosen
  The Rurik dynasty was the first ruling dynasty of Kievan Rus' and later Muscovy, traditionally traced to the Varangian prince Rurik and his descendants who governed much of Eastern Europe from the 9th to the 16th century.
• B. Vladimirovichi branch of the Romanov family
  The Vladimirovichi branch of the Romanov family was a prominent cadet line of the Russian imperial dynasty descended from Grand Duke Vladimir Alexandrovich, influential in late imperial politics and succession disputes.
• C. Romanovichi of Galicia–Volhynia
  The Romanovichi of Galicia–Volhynia were a medieval East Slavic ruling dynasty that governed the powerful Kingdom of Galicia–Volhynia in what is now western Ukraine and parts of Poland and Belarus.
• D. Gediminid dynasty
  The Gediminid dynasty was a powerful medieval ruling family that expanded the Grand Duchy of Lithuania into one of the largest states in Europe and provided monarchs to Lithuania, Poland, and other Eastern European realms.
• E. Yaroslavichi
  Yaroslavichi was the princely dynasty of the descendants of Yaroslav the Wise that ruled key principalities of Kievan Rus', including Chernigov.
• F. None of above.