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: Boris of Tver | Statement: [Principality of Tver, notableRuler, Boris of Tver]

Target entity: Boris of Tver
Context triple: [Principality of Tver, notableRuler, Boris of Tver]

• A. Mikhail of Tver
  Mikhail of Tver was a prominent early 14th-century Russian prince and Grand Prince of Vladimir who played a central role in the power struggle between Tver and Moscow and was later canonized as a martyr by the Russian Orthodox Church.
• B. Yuri Bogolyubsky
  Yuri Bogolyubsky was a Rus' prince who became the second husband of Queen Tamar of Georgia and briefly co-ruled before being deposed and exiled.
• C. 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.
• 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. Alexander Mikhailovich of Tver
  Alexander Mikhailovich of Tver was a 14th-century Russian prince and Grand Prince of Vladimir who played a key role in the power struggle between Tver and Moscow and was ultimately executed by the Mongol Golden Horde.
• 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: Boris of Tver
Triple: [Principality of Tver, notableRuler, Boris of Tver]

Boris of Tver was a medieval Russian prince who ruled the Principality of Tver and played a role in the regional power struggles of northeastern Rus'.

Target entity: Boris of Tver
Target entity description: Boris of Tver was a medieval Russian prince who ruled the Principality of Tver and played a role in the regional power struggles of northeastern Rus'.

• A. Mikhail of Tver
  Mikhail of Tver was a prominent early 14th-century Russian prince and Grand Prince of Vladimir who played a central role in the power struggle between Tver and Moscow and was later canonized as a martyr by the Russian Orthodox Church.
• B. Yuri Bogolyubsky
  Yuri Bogolyubsky was a Rus' prince who became the second husband of Queen Tamar of Georgia and briefly co-ruled before being deposed and exiled.
• C. 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.
• 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. Alexander Mikhailovich of Tver
  Alexander Mikhailovich of Tver was a 14th-century Russian prince and Grand Prince of Vladimir who played a key role in the power struggle between Tver and Moscow and was ultimately executed by the Mongol Golden Horde.
• F. None of above. chosen