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: Rostislav of Tmutarakan | Statement: [Rostislavichi of Galicia, namedAfter, Rostislav of Tmutarakan]

Target entity: Rostislav of Tmutarakan
Context triple: [Rostislavichi of Galicia, namedAfter, Rostislav of Tmutarakan]

• A. Boris of Kiev
  Boris of Kiev was a medieval Kievan Rus' prince and Christian martyr, later canonized as one of the revered saints Boris and Gleb.
• B. Igor of Kiev
  Igor of Kiev was a 10th-century Grand Prince of Kievan Rus', a member of the Rurik dynasty who ruled from Kiev and continued the consolidation of the early East Slavic state.
• C. Yaropolk I of Kiev
  Yaropolk I of Kiev was a 10th-century Grand Prince of Kievan Rus', known for his brief and turbulent reign marked by dynastic conflict with his brothers.
• D. Yaropolk II of Kiev
  Yaropolk II of Kiev was a 12th-century Grand Prince of Kiev from the Rurikid dynasty, known for his short and turbulent reign amid dynastic struggles in Kievan Rus'.
• E. Oleg Ivanovich of Ryazan
  Oleg Ivanovich of Ryazan was a 14th-century Russian prince known for his long and politically skillful rule over the Principality of Ryazan during the era of Mongol-Tatar dominance and the rise of Moscow.
• 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: Rostislav of Tmutarakan
Triple: [Rostislavichi of Galicia, namedAfter, Rostislav of Tmutarakan]

Rostislav of Tmutarakan was an 11th-century Rus' prince from the Rurikid dynasty who ruled the principality of Tmutarakan on the Black Sea and became the progenitor of the Rostislavichi line.

Target entity: Rostislav of Tmutarakan
Target entity description: Rostislav of Tmutarakan was an 11th-century Rus' prince from the Rurikid dynasty who ruled the principality of Tmutarakan on the Black Sea and became the progenitor of the Rostislavichi line.

• A. Boris of Kiev
  Boris of Kiev was a medieval Kievan Rus' prince and Christian martyr, later canonized as one of the revered saints Boris and Gleb.
• B. Igor of Kiev
  Igor of Kiev was a 10th-century Grand Prince of Kievan Rus', a member of the Rurik dynasty who ruled from Kiev and continued the consolidation of the early East Slavic state.
• C. Yaropolk I of Kiev
  Yaropolk I of Kiev was a 10th-century Grand Prince of Kievan Rus', known for his brief and turbulent reign marked by dynastic conflict with his brothers.
• D. Yaropolk II of Kiev
  Yaropolk II of Kiev was a 12th-century Grand Prince of Kiev from the Rurikid dynasty, known for his short and turbulent reign amid dynastic struggles in Kievan Rus'.
• E. Oleg Ivanovich of Ryazan
  Oleg Ivanovich of Ryazan was a 14th-century Russian prince known for his long and politically skillful rule over the Principality of Ryazan during the era of Mongol-Tatar dominance and the rise of Moscow.
• F. None of above. chosen