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: D400–D449 | Statement: [British Rail Class 50, fleetNumbers, D400–D449]

Target entity: D400–D449
Context triple: [British Rail Class 50, fleetNumbers, D400–D449]

• A. D40
  D40 is the third-generation Nissan Navara mid-size pickup truck platform produced globally in the mid-2000s to 2010s.
• B. D48
  D48 is a prehistoric megalithic dolmen located in the municipality of Aa en Hunze in the Dutch province of Drenthe.
• C. D-2000
  D-2000 was the civil registration of the pioneering German Junkers G 38, one of the largest and most distinctive all-metal airliners of the late 1920s and early 1930s.
• D. D4
  D4 is a commuter rail line within Moscow’s Moscow Central Diameters network, connecting suburban areas with the city through frequent, urban-style train service.
• E. D-2500
  D-2500 was the German civil-registered prototype and primary example of the Junkers G 38, a large all-metal four-engine transport aircraft of the late 1920s and early 1930s.
• 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: D400–D449
Triple: [British Rail Class 50, fleetNumbers, D400–D449]

D400–D449 were the original British Railways number range allocated to the Class 50 diesel-electric locomotives introduced in the late 1960s for high-speed passenger services.

Target entity: D400–D449
Target entity description: D400–D449 were the original British Railways number range allocated to the Class 50 diesel-electric locomotives introduced in the late 1960s for high-speed passenger services.

• A. D40
  D40 is the third-generation Nissan Navara mid-size pickup truck platform produced globally in the mid-2000s to 2010s.
• B. D48
  D48 is a prehistoric megalithic dolmen located in the municipality of Aa en Hunze in the Dutch province of Drenthe.
• C. D-2000
  D-2000 was the civil registration of the pioneering German Junkers G 38, one of the largest and most distinctive all-metal airliners of the late 1920s and early 1930s.
• D. D4
  D4 is a commuter rail line within Moscow’s Moscow Central Diameters network, connecting suburban areas with the city through frequent, urban-style train service.
• E. D-2500
  D-2500 was the German civil-registered prototype and primary example of the Junkers G 38, a large all-metal four-engine transport aircraft of the late 1920s and early 1930s.
• F. None of above. chosen