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: Rogvolod of Polotsk | Statement: [Principality of Polotsk, notablePerson, Rogvolod of Polotsk]

Target entity: Rogvolod of Polotsk
Context triple: [Principality of Polotsk, notablePerson, Rogvolod of Polotsk]

• 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. Roman Vladimirovich of Volhynia
  Roman Vladimirovich of Volhynia was a medieval Rus' prince of the Rurikid dynasty who ruled in the Volhynian region as a son of Grand Prince Vladimir II Monomakh.
• C. Vyacheslav Yaroslavich
  Vyacheslav Yaroslavich was a lesser-known 11th-century Rus' prince, one of the sons of Grand Prince Yaroslav the Wise of Kiev.
• 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. Iziaslav I of Kiev
  Iziaslav I of Kiev was an 11th-century Grand Prince of Kiev from the Rurikid dynasty, known for his turbulent reign marked by internal strife and shifting alliances with neighboring powers.
• 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: Rogvolod of Polotsk
Triple: [Principality of Polotsk, notablePerson, Rogvolod of Polotsk]

Rogvolod of Polotsk was a 10th-century Varangian prince who ruled the important East Slavic city of Polotsk and is known from early chronicles for his role in the power struggles preceding the Christianization of Kievan Rus'.

Target entity: Rogvolod of Polotsk
Target entity description: Rogvolod of Polotsk was a 10th-century Varangian prince who ruled the important East Slavic city of Polotsk and is known from early chronicles for his role in the power struggles preceding the Christianization of Kievan Rus'.

• 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. Roman Vladimirovich of Volhynia
  Roman Vladimirovich of Volhynia was a medieval Rus' prince of the Rurikid dynasty who ruled in the Volhynian region as a son of Grand Prince Vladimir II Monomakh.
• C. Vyacheslav Yaroslavich
  Vyacheslav Yaroslavich was a lesser-known 11th-century Rus' prince, one of the sons of Grand Prince Yaroslav the Wise of Kiev.
• 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. Iziaslav I of Kiev
  Iziaslav I of Kiev was an 11th-century Grand Prince of Kiev from the Rurikid dynasty, known for his turbulent reign marked by internal strife and shifting alliances with neighboring powers.
• F. None of above. chosen