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: 7th U.S. Cavalry Regiment | Statement: [Washita Battlefield National Historic Site, associatedWith, 7th U.S. Cavalry Regiment]

Target entity: 7th U.S. Cavalry Regiment
Context triple: [Washita Battlefield National Historic Site, associatedWith, 7th U.S. Cavalry Regiment]

• A. 2nd U.S. Cavalry
  The 2nd U.S. Cavalry was a pre–Civil War Regular Army regiment that served on the American frontier and later fought for the Union in the American Civil War.
• B. 7th Cavalry Regiment chosen
  The 7th Cavalry Regiment is a historic U.S. Army unit best known for its prominent roles in the Indian Wars, including the Battle of the Little Bighorn, and later in major conflicts such as the Vietnam War.
• C. Sixth Cavalry Regiment
  The Sixth Cavalry Regiment is a historic U.S. Army cavalry unit known for its active service in the Indian Wars and later conflicts.
• D. 1st U.S. Cavalry Regiment
  The 1st U.S. Cavalry Regiment is a historic United States Army cavalry unit that has served in numerous conflicts since the 19th century, including the Spanish–American War.
• E. 10th U.S. Cavalry Regiment
  The 10th U.S. Cavalry Regiment was one of the original African American "Buffalo Soldier" units in the U.S. Army, noted for its distinguished service in the Indian Wars and the Spanish–American War.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.