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 Cavalry Regiment (United States) | Statement: [Lakota–Northern Cheyenne alliance, opposedUnit, 7th Cavalry Regiment (United States)]

Target entity: 7th Cavalry Regiment (United States)
Context triple: [Lakota–Northern Cheyenne alliance, opposedUnit, 7th Cavalry Regiment (United States)]

• A. 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.
• B. 3rd Cavalry Regiment
  The 3rd Cavalry Regiment is a historic U.S. Army armored cavalry unit known for its reconnaissance and security missions in major conflicts from the 19th century through the wars in Iraq and Afghanistan.
• C. 2nd Cavalry Regiment
  The 2nd Cavalry Regiment is a historic U.S. Army cavalry unit, established in the 19th century, that has participated in numerous American military campaigns from the Indian Wars through modern conflicts.
• D. 108th Cavalry Regiment
  The 108th Cavalry Regiment is a United States Army National Guard cavalry unit with a history of reconnaissance and security roles, currently aligned under the 48th Infantry Brigade Combat Team.
• E. 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.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.