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: Eastern Theater | Statement: [Battle of Ball's Bluff, theater, Eastern Theater]

Target entity: Eastern Theater
Context triple: [Battle of Ball's Bluff, theater, Eastern Theater]

• A. Eastern Theater chosen
  The Eastern Theater was the primary region of major Civil War operations in Virginia, Maryland, and Pennsylvania, where many of the conflict’s most significant and famous battles took place.
• B. Southern theater of operations
  The Southern theater of operations was the region of the American Revolutionary War encompassing major campaigns and battles in the southern colonies, particularly in the Carolinas, Georgia, and Virginia.
• C. South Atlantic Blockading theater
  The South Atlantic Blockading theater was the Civil War naval operations area along the southeastern coast of the United States where Union forces sought to blockade Confederate ports and control key coastal waters.
• D. Atlantic coastal theater
  The Atlantic coastal theater was the region along the eastern seaboard of the United States and British North America where major naval operations, coastal raids, and amphibious assaults occurred during the War of 1812.
• E. Western Theater of Military Operations
  The Western Theater of Military Operations was a major Soviet strategic command responsible for coordinating large-scale military activities and planning in the western regions of the USSR, particularly in relation to European fronts.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.