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: Rostislavichi of Rostov | Statement: [Principality of Rostov, hasRuler, Rostislavichi of Rostov]

Target entity: Rostislavichi of Rostov
Context triple: [Principality of Rostov, hasRuler, Rostislavichi of Rostov]

• A. Rostislavichi of Smolensk
  The Rostislavichi of Smolensk were a medieval princely branch of the Rurikid dynasty that ruled the Principality of Smolensk in Kievan Rus and its successor states.
• B. 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'.
• C. Boris Konstantinovich of Suzdal
  Boris Konstantinovich of Suzdal was a medieval Rus' prince of the Suzdal principality known for his role in regional state-building and monastic patronage.
• D. Boris Vasilyevich of Volotsk
  Boris Vasilyevich of Volotsk was a 15th-century Russian prince of the Rurikid dynasty who ruled the appanage principality of Volotsk in the Grand Duchy of Moscow.
• E. Rostislavichi of Galicia
  The Rostislavichi of Galicia were a medieval princely dynasty that ruled parts of the historical region of Galicia in Kievan Rus’, often competing with other Rurikid branches for influence and control.
• 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: Rostislavichi of Rostov
Triple: [Principality of Rostov, hasRuler, Rostislavichi of Rostov]

The Rostislavichi of Rostov were a medieval Rus’ princely dynasty that ruled the Principality of Rostov, descending from the Rurikid line and playing a key role in the politics of northeastern Rus’.

Target entity: Rostislavichi of Rostov
Target entity description: The Rostislavichi of Rostov were a medieval Rus’ princely dynasty that ruled the Principality of Rostov, descending from the Rurikid line and playing a key role in the politics of northeastern Rus’.

• A. Rostislavichi of Smolensk
  The Rostislavichi of Smolensk were a medieval princely branch of the Rurikid dynasty that ruled the Principality of Smolensk in Kievan Rus and its successor states.
• B. 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'.
• C. Boris Konstantinovich of Suzdal
  Boris Konstantinovich of Suzdal was a medieval Rus' prince of the Suzdal principality known for his role in regional state-building and monastic patronage.
• D. Boris Vasilyevich of Volotsk
  Boris Vasilyevich of Volotsk was a 15th-century Russian prince of the Rurikid dynasty who ruled the appanage principality of Volotsk in the Grand Duchy of Moscow.
• E. Rostislavichi of Galicia
  The Rostislavichi of Galicia were a medieval princely dynasty that ruled parts of the historical region of Galicia in Kievan Rus’, often competing with other Rurikid branches for influence and control.
• F. None of above. chosen