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: Kęstutis | Statement: [Vytautas the Great, father, Kęstutis]

Target entity: Kęstutis
Context triple: [Vytautas the Great, father, Kęstutis]

• A. Gediminas
  Gediminas was a 14th-century Grand Duke who greatly expanded the Grand Duchy of Lithuania and laid the foundations for its rise as a major European power.
• B. Algirdas
  Algirdas was a 14th-century Grand Duke of Lithuania who greatly expanded the state's territory and influence, making it one of the largest powers in medieval Europe.
• C. Mindaugas
  Mindaugas was the 13th-century monarch who unified Lithuanian lands and became the first and only crowned King of Lithuania, laying the foundations of the Grand Duchy of Lithuania.
• D. Jogaila
  Jogaila, also known as Władysław II Jagiełło, was the Grand Duke of Lithuania who became King of Poland and co-founded the Polish–Lithuanian union that shaped Central and Eastern European politics in the late Middle Ages.
• E. Vytautas the Great
  Vytautas the Great was the Grand Duke of Lithuania (r. c. 1392–1430) who expanded the Grand Duchy to its greatest territorial extent and played a central role in Eastern European politics, including the Polish-Lithuanian union and conflicts with the Teutonic Order and the Golden Horde.
• 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: Kęstutis
Triple: [Vytautas the Great, father, Kęstutis]

Kęstutis was a 14th-century Grand Duke of Lithuania, a key military and political leader who defended the Grand Duchy against the Teutonic Order and was the father of Vytautas the Great.

Target entity: Kęstutis
Target entity description: Kęstutis was a 14th-century Grand Duke of Lithuania, a key military and political leader who defended the Grand Duchy against the Teutonic Order and was the father of Vytautas the Great.

• A. Gediminas
  Gediminas was a 14th-century Grand Duke who greatly expanded the Grand Duchy of Lithuania and laid the foundations for its rise as a major European power.
• B. Algirdas
  Algirdas was a 14th-century Grand Duke of Lithuania who greatly expanded the state's territory and influence, making it one of the largest powers in medieval Europe.
• C. Mindaugas
  Mindaugas was the 13th-century monarch who unified Lithuanian lands and became the first and only crowned King of Lithuania, laying the foundations of the Grand Duchy of Lithuania.
• D. Jogaila
  Jogaila, also known as Władysław II Jagiełło, was the Grand Duke of Lithuania who became King of Poland and co-founded the Polish–Lithuanian union that shaped Central and Eastern European politics in the late Middle Ages.
• E. Vytautas the Great
  Vytautas the Great was the Grand Duke of Lithuania (r. c. 1392–1430) who expanded the Grand Duchy to its greatest territorial extent and played a central role in Eastern European politics, including the Polish-Lithuanian union and conflicts with the Teutonic Order and the Golden Horde.
• F. None of above. chosen