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: Sergei Sobolev | Statement: [Steklov Institute of Mathematics, employerOf, Sergei Sobolev]

Target entity: Sergei Sobolev
Context triple: [Steklov Institute of Mathematics, employerOf, Sergei Sobolev]

• A. Mikhail Kuznetsov
  Mikhail Kuznetsov was a Soviet film and theater actor best known for his role in Sergei Eisenstein’s historical epic "Ivan the Terrible, Part II."
• B. Aleksei Vinogradov
  Aleksei Vinogradov was a Soviet military commander best known for leading Red Army forces during the early stages of the Winter War against Finland, including the ill-fated operations around Suomussalmi.
• C. Anatoli Firsov
  Anatoli Firsov was a legendary Soviet ice hockey forward renowned for his scoring prowess and international success during the 1960s and early 1970s.
• D. Sergei Zubatov
  Sergei Zubatov was a prominent Russian police official and ideologue of the late Imperial era, known for developing a system of state-controlled workers’ organizations to counter revolutionary movements.
• E. Boris Shakhlin
  Boris Shakhlin was a Soviet artistic gymnast and multiple Olympic champion, renowned as one of the sport’s dominant figures in the late 1950s and early 1960s.
• 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: Sergei Sobolev
Triple: [Steklov Institute of Mathematics, employerOf, Sergei Sobolev]

Sergei Sobolev was a prominent Soviet mathematician best known for founding the theory of Sobolev spaces, which are fundamental in functional analysis and partial differential equations.

Target entity: Sergei Sobolev
Target entity description: Sergei Sobolev was a prominent Soviet mathematician best known for founding the theory of Sobolev spaces, which are fundamental in functional analysis and partial differential equations.

• A. Mikhail Kuznetsov
  Mikhail Kuznetsov was a Soviet film and theater actor best known for his role in Sergei Eisenstein’s historical epic "Ivan the Terrible, Part II."
• B. Aleksei Vinogradov
  Aleksei Vinogradov was a Soviet military commander best known for leading Red Army forces during the early stages of the Winter War against Finland, including the ill-fated operations around Suomussalmi.
• C. Anatoli Firsov
  Anatoli Firsov was a legendary Soviet ice hockey forward renowned for his scoring prowess and international success during the 1960s and early 1970s.
• D. Sergei Zubatov
  Sergei Zubatov was a prominent Russian police official and ideologue of the late Imperial era, known for developing a system of state-controlled workers’ organizations to counter revolutionary movements.
• E. Boris Shakhlin
  Boris Shakhlin was a Soviet artistic gymnast and multiple Olympic champion, renowned as one of the sport’s dominant figures in the late 1950s and early 1960s.
• F. None of above. chosen