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: Ferdinand IV of Castile | Statement: [Isabella of Castile, sibling, Ferdinand IV of Castile]

Target entity: Ferdinand IV of Castile
Context triple: [Isabella of Castile, sibling, Ferdinand IV of Castile]

• A. Ferdinand IV of Castile chosen
  Ferdinand IV of Castile was a medieval king of Castile and León, remembered for his turbulent reign marked by internal noble conflicts and efforts to consolidate royal authority in the early 14th century.
• B. Ferdinand III
  Ferdinand III was a 17th-century Habsburg ruler who served as Holy Roman Emperor during the final phase of the Thirty Years' War and helped shape the Peace of Westphalia.
• C. Ferdinand III of Castile
  Ferdinand III of Castile was a 13th-century king of Castile and León renowned for his major role in the Reconquista and later canonization as a saint.
• D. Sancho IV of Castile
  Sancho IV of Castile was a 13th-century king of Castile and León known for consolidating royal authority amid internal dynastic conflicts and external wars on the Iberian Peninsula.
• E. Ferdinand of Antequera
  Ferdinand of Antequera was a Castilian prince of the House of Trastámara who became King Ferdinand I of Aragon in the early 15th century.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.