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: YF-77 | Statement: [Long March 5, coreStageEngine, YF-77]

Target entity: YF-77
Context triple: [Long March 5, coreStageEngine, YF-77]

• A. YF-16
  The YF-16 was a prototype American single-engine jet fighter developed by General Dynamics that evolved into the highly successful F-16 Fighting Falcon multirole combat aircraft.
• B. Xian JH-7
  The Xian JH-7 is a Chinese twin-engine fighter-bomber designed for long-range strike missions, particularly in maritime attack roles.
• C. Y-20
  The Y-20 is a large Chinese military transport aircraft designed for strategic airlift of troops, equipment, and supplies over long distances.
• D. Xian WS-9
  The Xian WS-9 is a Chinese-built turbofan aircraft engine produced under license from the British Rolls-Royce Spey design.
• E. Shenyang J-11BS
  The Shenyang J-11BS is a Chinese twin-seat, multirole fighter aircraft developed as a domestically produced variant of the Russian Su-27, used primarily for training and combat missions by the People's Liberation Army Air Force.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: YF-77
Target entity description: YF-77 is a Chinese liquid hydrogen–liquid oxygen rocket engine developed to power the core stage of the Long March 5 heavy-lift launch vehicle.

• A. YF-16
  The YF-16 was a prototype American single-engine jet fighter developed by General Dynamics that evolved into the highly successful F-16 Fighting Falcon multirole combat aircraft.
• B. Xian JH-7
  The Xian JH-7 is a Chinese twin-engine fighter-bomber designed for long-range strike missions, particularly in maritime attack roles.
• C. Y-20
  The Y-20 is a large Chinese military transport aircraft designed for strategic airlift of troops, equipment, and supplies over long distances.
• D. Xian WS-9
  The Xian WS-9 is a Chinese-built turbofan aircraft engine produced under license from the British Rolls-Royce Spey design.
• E. Shenyang J-11BS
  The Shenyang J-11BS is a Chinese twin-seat, multirole fighter aircraft developed as a domestically produced variant of the Russian Su-27, used primarily for training and combat missions by the People's Liberation Army Air Force.
• F. None of above. chosen