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: Army of the Mississippi (Union land forces under McClernand) | Statement: [Battle of Arkansas Post, involvedUnit, Army of the Mississippi (Union land forces under McClernand)]

Target entity: Army of the Mississippi (Union land forces under McClernand)
Context triple: [Battle of Arkansas Post, involvedUnit, Army of the Mississippi (Union land forces under McClernand)]

• A. Army of the Mississippi chosen
  The Army of the Mississippi was a Union field army during the American Civil War that operated primarily in the Western Theater, participating in key campaigns along the Mississippi River and in the Western states.
• B. Army Group under Ulysses S. Grant
  The Army Group under Ulysses S. Grant was the overarching Union command structure that coordinated multiple major field armies during the final campaigns of the American Civil War, including the drive against Richmond and the Appomattox Campaign.
• C. Don Carlos Buell’s Army of the Ohio
  Don Carlos Buell’s Army of the Ohio was a major Union field army in the Western Theater of the American Civil War, noted for its timely arrival to reinforce Federal forces at key battles such as Shiloh.
• D. Confederate Army of Mississippi
  The Confederate Army of Mississippi was a major Confederate field army in the Western Theater of the American Civil War, notably commanded by generals such as Albert Sidney Johnston and P.G.T. Beauregard.
• E. XV Corps (Union)
  XV Corps (Union) was a major Union Army corps in the American Civil War, best known for its service in the Western Theater under generals such as William T. Sherman.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.