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: Ivan Kostov | Statement: [Simeon II, primeMinisterPredecessor, Ivan Kostov]

Target entity: Ivan Kostov
Context triple: [Simeon II, primeMinisterPredecessor, Ivan Kostov]

• A. Emil Kostadinov
  Emil Kostadinov is a former Bulgarian footballer best known as a prolific forward for both CSKA Sofia and the Bulgarian national team, notably helping Bulgaria qualify for the 1994 FIFA World Cup.
• B. Ivan Hadzhinikolov
  Ivan Hadzhinikolov was a Bulgarian revolutionary and educator best known as one of the principal founders and organizers of the Internal Macedonian Revolutionary Organization (IMRO).
• C. Stanislav Nikolov
  Stanislav Nikolov is a researcher known for co-authoring the landmark 2021 Nature paper on AlphaFold, the deep learning system for highly accurate protein structure prediction.
• D. Georgi Todorov
  Georgi Todorov was a Bulgarian general who played a prominent command role in the Balkan Wars and World War I.
• E. Yordan Letchkov
  Yordan Letchkov is a former Bulgarian attacking midfielder best known for his decisive headed goal against Germany at the 1994 FIFA World Cup, which helped Bulgaria reach the semifinals.
• 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: Ivan Kostov
Triple: [Simeon II, primeMinisterPredecessor, Ivan Kostov]

Ivan Kostov is a Bulgarian economist and politician who served as Prime Minister of Bulgaria from 1997 to 2001, leading major post-communist economic and political reforms.

Target entity: Ivan Kostov
Target entity description: Ivan Kostov is a Bulgarian economist and politician who served as Prime Minister of Bulgaria from 1997 to 2001, leading major post-communist economic and political reforms.

• A. Emil Kostadinov
  Emil Kostadinov is a former Bulgarian footballer best known as a prolific forward for both CSKA Sofia and the Bulgarian national team, notably helping Bulgaria qualify for the 1994 FIFA World Cup.
• B. Ivan Hadzhinikolov
  Ivan Hadzhinikolov was a Bulgarian revolutionary and educator best known as one of the principal founders and organizers of the Internal Macedonian Revolutionary Organization (IMRO).
• C. Stanislav Nikolov
  Stanislav Nikolov is a researcher known for co-authoring the landmark 2021 Nature paper on AlphaFold, the deep learning system for highly accurate protein structure prediction.
• D. Georgi Todorov
  Georgi Todorov was a Bulgarian general who played a prominent command role in the Balkan Wars and World War I.
• E. Yordan Letchkov
  Yordan Letchkov is a former Bulgarian attacking midfielder best known for his decisive headed goal against Germany at the 1994 FIFA World Cup, which helped Bulgaria reach the semifinals.
• F. None of above. chosen

Target predicate: primeMinisterPredecessor
Context triple: [Simeon II, primeMinisterPredecessor, Ivan Kostov]

• A. predecessorAsPrimeMinister chosen
  Indicates that one person previously held the office of Prime Minister immediately before another person.
• B. lastPrimeMinister
  Indicates that the subject is the most recent individual to have held the office of prime minister of the object entity.
• C. primeMinisterFrom
  Indicates that a person serves or has served as the prime minister of a specified country, region, or political entity.
• D. primeMinisterOf
  Indicates that a person holds the office of prime minister as the head of government of a specified country or political entity.
• E. primeMinisterUnder
  Indicates that one person holds the position of prime minister serving under the authority, leadership, or administration of another specified person (such as a head of state or monarch).
• F. None of above.