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: Martin XB-51 bomber prototype | Statement: [Glenn L. Martin Company, product, Martin XB-51 bomber prototype]

Target entity: Martin XB-51 bomber prototype
Context triple: [Glenn L. Martin Company, product, Martin XB-51 bomber prototype]

• A. Northrop YB-49
  The Northrop YB-49 was an experimental American jet-powered flying wing bomber developed in the late 1940s to test advanced aerodynamic concepts for the U.S. Air Force.
• B. Lockheed XP-49
  The Lockheed XP-49 was an experimental American twin-engine fighter prototype developed during World War II as an advanced, high-altitude derivative of the P-38 Lightning.
• C. Convair XF-92
  The Convair XF-92 was an experimental American delta-wing jet interceptor prototype developed in the late 1940s that served as a pioneering testbed for high-speed delta-wing aircraft design.
• D. Curtiss XP-55 Ascender
  The Curtiss XP-55 Ascender was an experimental World War II–era American fighter prototype notable for its radical canard pusher configuration and unconventional aerodynamic design.
• E. Republic XF-103
  The Republic XF-103 was an experimental American Cold War–era interceptor aircraft project intended to achieve very high supersonic speeds using advanced materials and propulsion, but it was cancelled before a prototype was completed.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"

Entity: Martin XB-51 bomber prototype
Triple: [Glenn L. Martin Company, product, Martin XB-51 bomber prototype]

The Martin XB-51 bomber prototype was an experimental American jet-powered ground-attack aircraft developed in the late 1940s, notable for its unusual three-engine configuration and high-speed, low-level performance.

Target entity: Martin XB-51 bomber prototype
Target entity description: The Martin XB-51 bomber prototype was an experimental American jet-powered ground-attack aircraft developed in the late 1940s, notable for its unusual three-engine configuration and high-speed, low-level performance.

• A. Northrop YB-49
  The Northrop YB-49 was an experimental American jet-powered flying wing bomber developed in the late 1940s to test advanced aerodynamic concepts for the U.S. Air Force.
• B. Lockheed XP-49
  The Lockheed XP-49 was an experimental American twin-engine fighter prototype developed during World War II as an advanced, high-altitude derivative of the P-38 Lightning.
• C. Convair XF-92
  The Convair XF-92 was an experimental American delta-wing jet interceptor prototype developed in the late 1940s that served as a pioneering testbed for high-speed delta-wing aircraft design.
• D. Curtiss XP-55 Ascender
  The Curtiss XP-55 Ascender was an experimental World War II–era American fighter prototype notable for its radical canard pusher configuration and unconventional aerodynamic design.
• E. Republic XF-103
  The Republic XF-103 was an experimental American Cold War–era interceptor aircraft project intended to achieve very high supersonic speeds using advanced materials and propulsion, but it was cancelled before a prototype was completed.
• F. None of above. chosen