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: BR Standard Class 4 | Statement: [British Railways London Midland Region, operatedLocomotiveClass, BR Standard Class 4]

Target entity: BR Standard Class 4
Context triple: [British Railways London Midland Region, operatedLocomotiveClass, BR Standard Class 4]

• A. BR Standard Class 5
  The BR Standard Class 5 was a versatile British steam locomotive class introduced in the 1950s for mixed-traffic duties across the nationalised railway network.
• B. BR Standard Class 4 steam locomotives chosen
  BR Standard Class 4 steam locomotives are mid-20th-century British Railways mixed-traffic steam engines designed for versatility and efficiency on both passenger and freight services.
• C. LNER Class K3
  The LNER Class K3 was a class of British 2-6-0 steam locomotives designed by Sir Nigel Gresley for heavy mixed-traffic work on the London and North Eastern Railway.
• D. LMS Jubilee Class
  The LMS Jubilee Class was a class of British steam locomotives built in the 1930s for express passenger services on the London, Midland and Scottish Railway.
• E. British Rail Class 40
  The British Rail Class 40 is a class of heavy diesel-electric locomotives built in the late 1950s and early 1960s for express passenger and freight services on British Railways, now preserved and operated on heritage lines.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.