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: Juan Alfonso of Castile | Statement: [Fadrique Alfonso of Castile, sibling, Juan Alfonso of Castile]

Target entity: Juan Alfonso of Castile
Context triple: [Fadrique Alfonso of Castile, sibling, Juan Alfonso of Castile]

• A. Juan Alfonso of Castile chosen
  Juan Alfonso of Castile was an illegitimate son of King Alfonso XI of Castile who held noble status within the Castilian royal family.
• B. Pedro Alfonso of Castile
  Pedro Alfonso of Castile was an illegitimate son of King Alfonso XI of Castile and his mistress Eleanor de Guzmán, known as a Castilian nobleman of the 14th century.
• C. Simon of Castile
  Simon of Castile was a lesser-known medieval nobleman, likely a younger son of the French countess Joan of Ponthieu who held ties to both French and Castilian aristocracy.
• D. Fadrique Alfonso of Castile
  Fadrique Alfonso of Castile was a 14th-century Castilian nobleman and military leader, Master of the Order of Santiago and illegitimate son of King Alfonso XI, whose execution was ordered by his half-brother King Peter I.
• E. Peter of Castile
  Peter of Castile, also known as Peter the Cruel or Peter the Just, was the 14th-century king of Castile and León whose turbulent reign was marked by civil war, shifting alliances, and a lasting reputation for both brutality and administrative reform.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.