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: Mikoyan-Gurevich MiG-21 | Statement: [Bulgarian Air Force, historicalAircraftOperated, Mikoyan-Gurevich MiG-21]

Target entity: Mikoyan-Gurevich MiG-21
Context triple: [Bulgarian Air Force, historicalAircraftOperated, Mikoyan-Gurevich MiG-21]

• A. Mikoyan-Gurevich MiG-21 chosen
  The Mikoyan-Gurevich MiG-21 is a supersonic jet fighter aircraft introduced by the Soviet Union in the late 1950s, widely exported and renowned as one of the most produced combat aircraft in history.
• B. Mikoyan-Gurevich MiG-23
  The Mikoyan-Gurevich MiG-23 is a Soviet variable-geometry fighter aircraft introduced in the late 1960s, known for its swing-wing design, high speed, and widespread use by Warsaw Pact and allied air forces during the Cold War.
• C. Mikoyan-Gurevich MiG-17
  The Mikoyan-Gurevich MiG-17 is a Soviet jet fighter aircraft introduced in the early 1950s, widely used during the Cold War and notably in the Vietnam War for its agility and effectiveness in air combat.
• D. MiG-29
  The MiG-29 is a Soviet-designed twin-engine multirole fighter aircraft known for its high maneuverability and widespread use by various air forces around the world.
• E. Mikoyan-Gurevich MiG-15
  The Mikoyan-Gurevich MiG-15 is a pioneering Soviet jet fighter of the early Cold War era, renowned for its swept-wing design and major role in the Korean War.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target predicate: historicalAircraftOperated
Context triple: [Bulgarian Air Force, historicalAircraftOperated, Mikoyan-Gurevich MiG-21]

• A. aircraftFlown
  Indicates that an entity (typically a person or organization) operates or pilots a particular aircraft.
• B. notableTransportAircraft
  Indicates that the subject is a transport aircraft recognized for particular significance, such as historical importance, performance, or impact on aviation.
• C. notableAircraftPowered
  Indicates that an aircraft is notably powered or propelled by a specified engine, powerplant, or propulsion system.
• D. aircraftManufacturerUsed
  Indicates that a particular aircraft manufacturer was employed or utilized in relation to another entity, such as for production, design, or supply purposes.
• E. notableAircraftTested
  Indicates that the subject conducted tests or evaluations on the specified aircraft, which is considered notable or significant.
• F. None of above. chosen