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 Smolensk | Statement: [Monomakhovichi, hasMember, Rostislavichi of Smolensk]

Target entity: Rostislavichi of Smolensk
Context triple: [Monomakhovichi, hasMember, Rostislavichi of Smolensk]

• A. Yury Ivanovich of Dmitrov
  Yury Ivanovich of Dmitrov was a Russian prince of the late 15th–early 16th century, known as a younger son of Grand Prince Ivan III and a regional ruler within the centralized Muscovite state.
• B. Prince of Novgorod
  The Prince of Novgorod was the medieval ruler of the influential city-state of Novgorod, a key political and commercial center in Kievan and later Russian lands.
• C. Oleg of Novgorod
  Oleg of Novgorod was a Varangian prince and regent who expanded and consolidated the early Kievan Rus', traditionally credited with moving the capital to Kiev and laying the foundations of the medieval Rus' state.
• D. Daniil Aleksandrovich of Moscow
  Daniil Aleksandrovich of Moscow was a medieval Russian prince, the youngest son of Alexander Nevsky, who became the first Prince of Moscow and laid the foundations for its future rise.
• E. Vladimir II Monomakh
  Vladimir II Monomakh was a Grand Prince of Kievan Rus' renowned for his military leadership, efforts to unify the realm, and authorship of the moral treatise "Instruction."
• 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 Smolensk
Triple: [Monomakhovichi, hasMember, 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.

Target entity: Rostislavichi of Smolensk
Target entity description: 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.

• A. Yury Ivanovich of Dmitrov
  Yury Ivanovich of Dmitrov was a Russian prince of the late 15th–early 16th century, known as a younger son of Grand Prince Ivan III and a regional ruler within the centralized Muscovite state.
• B. Prince of Novgorod
  The Prince of Novgorod was the medieval ruler of the influential city-state of Novgorod, a key political and commercial center in Kievan and later Russian lands.
• C. Oleg of Novgorod
  Oleg of Novgorod was a Varangian prince and regent who expanded and consolidated the early Kievan Rus', traditionally credited with moving the capital to Kiev and laying the foundations of the medieval Rus' state.
• D. Daniil Aleksandrovich of Moscow
  Daniil Aleksandrovich of Moscow was a medieval Russian prince, the youngest son of Alexander Nevsky, who became the first Prince of Moscow and laid the foundations for its future rise.
• E. Vladimir II Monomakh
  Vladimir II Monomakh was a Grand Prince of Kievan Rus' renowned for his military leadership, efforts to unify the realm, and authorship of the moral treatise "Instruction."
• F. None of above. chosen