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: British Rail Class 50 | Statement: [English Electric, product, British Rail Class 50]

Target entity: British Rail Class 50
Context triple: [English Electric, product, British Rail Class 50]

• A. British Rail Class 50 chosen
  The British Rail Class 50 is a class of powerful diesel-electric locomotives built in the late 1960s for high-speed passenger services on the British railway network, particularly on the West Coast Main Line.
• B. British Rail Class 57
  The British Rail Class 57 is a rebuilt diesel-electric locomotive class for the UK rail network, created by re-engineering older locomotives with updated engines and systems to extend their service life and improve performance.
• C. British Rail Class 45
  The British Rail Class 45 is a class of large diesel-electric locomotives introduced in the early 1960s for heavy passenger and freight services on British Rail’s main lines, particularly in the Midlands and northern England.
• D. British Rail Class 46
  The British Rail Class 46 was a class of diesel-electric locomotives built in the early 1960s for mixed-traffic duties on British Rail’s mainline network.
• E. British Rail Class 37
  The British Rail Class 37 is a class of diesel-electric locomotives introduced in the early 1960s, renowned for their distinctive growling engine sound and long service life across the UK rail network.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.