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 Ivanovich of Russia | Statement: [Feodor I of Russia, sibling, Ivan Ivanovich of Russia]

Target entity: Ivan Ivanovich of Russia
Context triple: [Feodor I of Russia, sibling, Ivan Ivanovich of Russia]

• A. Ivan Mikhailovich of Russia
  Ivan Mikhailovich of Russia was a medieval Russian prince of the ruling Rurikid dynasty, known primarily as a member of the Moscow princely family.
• B. Ivan Vsevolozhsky
  Ivan Vsevolozhsky was a Russian arts administrator and director of the Imperial Theatres best known for initiating and collaborating on major ballets with Tchaikovsky and Petipa during the late 19th century.
• C. Ivan Romanov
  Ivan Romanov was a Russian nobleman and political figure associated with the early 17th-century boyar elite during the Time of Troubles.
• D. Ivan Alekseyevich
  Ivan Alekseyevich, better known as Ivan V of Russia, was a late 17th-century Tsar who nominally co-ruled with his half-brother Peter the Great while wielding limited actual power.
• E. Prince Ivan Nikitich Odoevsky
  Prince Ivan Nikitich Odoevsky was a Russian nobleman and statesman of the early modern period, noted for his role in imperial administration and regional development.
• 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 Ivanovich of Russia
Triple: [Feodor I of Russia, sibling, Ivan Ivanovich of Russia]

Ivan Ivanovich of Russia was the eldest son and heir apparent of Tsar Ivan the Terrible, whose death before his father—traditionally said to have occurred after a violent quarrel with him—helped precipitate the Time of Troubles.

Target entity: Ivan Ivanovich of Russia
Target entity description: Ivan Ivanovich of Russia was the eldest son and heir apparent of Tsar Ivan the Terrible, whose death before his father—traditionally said to have occurred after a violent quarrel with him—helped precipitate the Time of Troubles.

• A. Ivan Mikhailovich of Russia
  Ivan Mikhailovich of Russia was a medieval Russian prince of the ruling Rurikid dynasty, known primarily as a member of the Moscow princely family.
• B. Ivan Vsevolozhsky
  Ivan Vsevolozhsky was a Russian arts administrator and director of the Imperial Theatres best known for initiating and collaborating on major ballets with Tchaikovsky and Petipa during the late 19th century.
• C. Ivan Romanov
  Ivan Romanov was a Russian nobleman and political figure associated with the early 17th-century boyar elite during the Time of Troubles.
• D. Ivan Alekseyevich
  Ivan Alekseyevich, better known as Ivan V of Russia, was a late 17th-century Tsar who nominally co-ruled with his half-brother Peter the Great while wielding limited actual power.
• E. Prince Ivan Nikitich Odoevsky
  Prince Ivan Nikitich Odoevsky was a Russian nobleman and statesman of the early modern period, noted for his role in imperial administration and regional development.
• F. None of above. chosen