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: Frederick I, Duke of Austria | Statement: [Leopold V, Duke of Austria, successor, Frederick I, Duke of Austria]

Target entity: Frederick I, Duke of Austria
Context triple: [Leopold V, Duke of Austria, successor, Frederick I, Duke of Austria]

• A. Frederick I, Duke of Austria chosen
  Frederick I, Duke of Austria was a late 12th- to early 13th-century Babenberg ruler who governed the Duchy of Austria and Styria and continued his family's consolidation of power in the region.
• B. Frederick II, Duke of Austria
  Frederick II, Duke of Austria was the last male member of the Babenberg dynasty, whose death in 1246 triggered a succession crisis and power struggle over the Austrian lands.
• C. Henry II, Duke of Austria
  Henry II, Duke of Austria was a 13th-century Babenberg ruler who briefly held the ducal title before dying young and leaving the succession to the Austrian lands contested.
• D. Leopold V, Duke of Austria
  Leopold V, Duke of Austria, was a 12th-century Babenberg ruler best known for his role in the Third Crusade and for capturing King Richard I of England on his return from the Holy Land.
• E. Albrecht van Oostenrijk
  Albrecht van Oostenrijk (Archduke Albert of Austria) was a Habsburg prince and Governor of the Spanish Netherlands who led the Spanish forces against the Dutch during the Eighty Years' War.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.