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 IV, Duke of Austria | Statement: [Archduke Sigismund of Austria, predecessor, Frederick IV, Duke of Austria]

Target entity: Frederick IV, Duke of Austria
Context triple: [Archduke Sigismund of Austria, predecessor, Frederick IV, Duke of Austria]

• A. Frederick IV, Duke of Austria chosen
  Frederick IV, Duke of Austria was a late medieval Habsburg ruler of Tyrol and Further Austria whose consolidation of these territories helped strengthen the Habsburg position in the Holy Roman Empire.
• B. Frederick III, Duke of Austria
  Frederick III, Duke of Austria was a late 14th- to early 15th-century Habsburg nobleman who ruled parts of the Austrian duchy during a period of internal dynastic divisions.
• C. 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.
• D. Albert IV, Duke of Austria
  Albert IV, Duke of Austria was a late 14th-century Habsburg ruler of part of the Austrian hereditary lands and a member of the influential Habsburg dynasty.
• E. Frederick I, Duke of Austria
  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.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.