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: 2nd U.S. Cavalry | Statement: [Earl Van Dorn, servedInUnit, 2nd U.S. Cavalry]

Target entity: 2nd U.S. Cavalry
Context triple: [Earl Van Dorn, servedInUnit, 2nd U.S. Cavalry]

• A. 7th Cavalry Regiment
  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. 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.
• C. 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.
• D. 9th U.S. Cavalry Regiment
  The 9th U.S. Cavalry Regiment is a historic African American "Buffalo Soldier" unit of the United States Army that served prominently in the Indian Wars, the Spanish–American War, and later conflicts.
• E. 13th Light Dragoons
  The 13th Light Dragoons was a British Army cavalry regiment best known for its role in the Charge of the Light Brigade during the Crimean War.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"

Entity: 2nd U.S. Cavalry
Triple: [Earl Van Dorn, servedInUnit, 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.

Target entity: 2nd U.S. Cavalry
Target entity description: 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.

• A. 7th Cavalry Regiment
  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. 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.
• C. 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.
• D. 9th U.S. Cavalry Regiment
  The 9th U.S. Cavalry Regiment is a historic African American "Buffalo Soldier" unit of the United States Army that served prominently in the Indian Wars, the Spanish–American War, and later conflicts.
• E. 13th Light Dragoons
  The 13th Light Dragoons was a British Army cavalry regiment best known for its role in the Charge of the Light Brigade during the Crimean War.
• F. None of above. chosen