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: emerged as leading princely title after decline of Kiev | Statement: [Grand Prince of Vladimir, history, emerged as leading princely title after decline of Kiev]

Target entity: emerged as leading princely title after decline of Kiev
Context triple: [Grand Prince of Vladimir, history, emerged as leading princely title after decline of Kiev]

• A. King of Ruthenia
  The King of Ruthenia was the medieval monarchic title held by the ruler of the Ruthenian (Galician-Volhynian) lands in Eastern Europe, centered in what is now western Ukraine.
• B. Principality of Kiev
  The Principality of Kiev was a medieval East Slavic state centered on the city of Kiev, which served as a major political, cultural, and religious hub of Kievan Rus' before its decline under Mongol invasion.
• C. Principality of Chernigov
  The Principality of Chernigov was a major medieval East Slavic state centered on the city of Chernihiv, influential within Kievan Rus' and later ruled by the Olgovichi dynasty.
• D. Moscow principality
  The Moscow principality, or Muscovy, was a medieval Russian state centered on the city of Moscow that expanded to become the core of the unified Russian state.
• E. Principality of Moscow
  The Principality of Moscow was a medieval East Slavic state centered on the city of Moscow that laid the foundations for the later Grand Duchy of Moscow and the Russian state.
• 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: emerged as leading princely title after decline of Kiev
Triple: [Grand Prince of Vladimir, history, emerged as leading princely title after decline of Kiev]

The Grand Prince of Vladimir was the foremost ruler of medieval northeastern Rus’, whose title became the primary center of political power and prestige after the waning of Kievan authority.

Target entity: emerged as leading princely title after decline of Kiev
Target entity description: The Grand Prince of Vladimir was the foremost ruler of medieval northeastern Rus’, whose title became the primary center of political power and prestige after the waning of Kievan authority.

• A. King of Ruthenia
  The King of Ruthenia was the medieval monarchic title held by the ruler of the Ruthenian (Galician-Volhynian) lands in Eastern Europe, centered in what is now western Ukraine.
• B. Principality of Kiev
  The Principality of Kiev was a medieval East Slavic state centered on the city of Kiev, which served as a major political, cultural, and religious hub of Kievan Rus' before its decline under Mongol invasion.
• C. Principality of Chernigov
  The Principality of Chernigov was a major medieval East Slavic state centered on the city of Chernihiv, influential within Kievan Rus' and later ruled by the Olgovichi dynasty.
• D. Moscow principality
  The Moscow principality, or Muscovy, was a medieval Russian state centered on the city of Moscow that expanded to become the core of the unified Russian state.
• E. Principality of Moscow
  The Principality of Moscow was a medieval East Slavic state centered on the city of Moscow that laid the foundations for the later Grand Duchy of Moscow and the Russian state.
• F. None of above. chosen