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: Department of the Rappahannock (Union Army) | Statement: [Army of Virginia, predecessorUnit, Department of the Rappahannock (Union Army)]

Target entity: Department of the Rappahannock (Union Army)
Context triple: [Army of Virginia, predecessorUnit, Department of the Rappahannock (Union Army)]

• A. I Corps, Army of Virginia
  I Corps, Army of Virginia was a major Union Army corps-level formation that served under the short-lived Army of Virginia during the American Civil War.
• B. 6th Maryland Regiment
  The 6th Maryland Regiment was a Continental Army infantry unit from Maryland that gained distinction for its disciplined performance and heavy engagement in key battles of the American Revolutionary War.
• C. Union Army of Northeastern Virginia
  The Union Army of Northeastern Virginia was the primary Federal field army in the Eastern Theater at the outset of the American Civil War, best known for its role in the First Battle of Bull Run in 1861.
• D. Army of the Shenandoah (Confederate)
  The Army of the Shenandoah (Confederate) was an early Confederate field army operating in the strategically vital Shenandoah Valley of Virginia during the opening phase of the American Civil War.
• E. 13th Virginia Cavalry Regiment
  The 13th Virginia Cavalry Regiment was a Confederate cavalry unit from Virginia that served prominently in the Army of Northern Virginia during the American Civil 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: Department of the Rappahannock (Union Army)
Triple: [Army of Virginia, predecessorUnit, Department of the Rappahannock (Union Army)]

The Department of the Rappahannock (Union Army) was a short-lived Union field command in the Eastern Theater of the American Civil War, responsible for operations along the Rappahannock River in Virginia.

Target entity: Department of the Rappahannock (Union Army)
Target entity description: The Department of the Rappahannock (Union Army) was a short-lived Union field command in the Eastern Theater of the American Civil War, responsible for operations along the Rappahannock River in Virginia.

• A. I Corps, Army of Virginia
  I Corps, Army of Virginia was a major Union Army corps-level formation that served under the short-lived Army of Virginia during the American Civil War.
• B. 6th Maryland Regiment
  The 6th Maryland Regiment was a Continental Army infantry unit from Maryland that gained distinction for its disciplined performance and heavy engagement in key battles of the American Revolutionary War.
• C. Union Army of Northeastern Virginia
  The Union Army of Northeastern Virginia was the primary Federal field army in the Eastern Theater at the outset of the American Civil War, best known for its role in the First Battle of Bull Run in 1861.
• D. Army of the Shenandoah (Confederate)
  The Army of the Shenandoah (Confederate) was an early Confederate field army operating in the strategically vital Shenandoah Valley of Virginia during the opening phase of the American Civil War.
• E. 13th Virginia Cavalry Regiment
  The 13th Virginia Cavalry Regiment was a Confederate cavalry unit from Virginia that served prominently in the Army of Northern Virginia during the American Civil War.
• F. None of above. chosen