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 21st Army Group | Statement: [U.S. Ninth Army, cooperatedWith, British 21st Army Group]

Target entity: British 21st Army Group
Context triple: [U.S. Ninth Army, cooperatedWith, British 21st Army Group]

• A. 12th Army Group
  The 12th Army Group was a major U.S. Army field army formation in northwest Europe during World War II, commanded by General Omar Bradley and instrumental in the Allied advance from Normandy into Germany.
• B. 21st Army Group chosen
  The 21st Army Group was a major British-led Allied field army formation in Northwest Europe during World War II, commanded by General Bernard Montgomery and instrumental in the liberation of Western Europe after D-Day.
• C. 18th Army Group
  The 18th Army Group was a high-level Allied field headquarters in the North African campaign of World War II, coordinating British and American forces under the command of General Harold Alexander.
• D. British Eighth Army
  The British Eighth Army was a major field army of the British Army in World War II, best known for its pivotal role in the North African campaign, including the victory at El Alamein.
• E. British First Army
  The British First Army was a World War II Allied field army that fought in the North African campaign, notably in Tunisia, before participating in the invasion of Sicily.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.