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: Third System of US seacoast defense | Statement: [Fort Sumter, builtDuring, Third System of US seacoast defense]

Target entity: Third System of US seacoast defense
Context triple: [Fort Sumter, builtDuring, Third System of US seacoast defense]

• A. Chain Home radar network
  The Chain Home radar network was Britain’s pioneering early-warning radar system that provided long-range detection of enemy aircraft during the early years of World War II, crucially aiding air defense in the Battle of Britain.
• B. Fort Wadsworth
  Fort Wadsworth is a historic former military installation and coastal defense fortification located at the Narrows in New York Harbor, now part of the Gateway National Recreation Area.
• C. Patriot missile system
  The Patriot missile system is a long-range, all-altitude, air-defense system designed to detect, track, and intercept incoming aircraft, missiles, and drones, widely used by the U.S. and allied militaries.
• D. Naval Facilities Engineering Systems Command
  Naval Facilities Engineering Systems Command is a United States Navy organization responsible for planning, building, and maintaining naval shore facilities and infrastructure worldwide.
• E. Treasure Island Naval Station (former)
  Treasure Island Naval Station (former) was a decommissioned U.S. Navy base located on San Francisco Bay’s man-made Treasure Island, historically used for training, administration, and support operations.
• 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: Third System of US seacoast defense
Triple: [Fort Sumter, builtDuring, Third System of US seacoast defense]

The Third System of US seacoast defense was a 19th-century American coastal fortification program that constructed large, permanent masonry forts to protect key harbors and strategic points along the nation’s shoreline.

Target entity: Third System of US seacoast defense
Target entity description: The Third System of US seacoast defense was a 19th-century American coastal fortification program that constructed large, permanent masonry forts to protect key harbors and strategic points along the nation’s shoreline.

• A. Chain Home radar network
  The Chain Home radar network was Britain’s pioneering early-warning radar system that provided long-range detection of enemy aircraft during the early years of World War II, crucially aiding air defense in the Battle of Britain.
• B. Fort Wadsworth
  Fort Wadsworth is a historic former military installation and coastal defense fortification located at the Narrows in New York Harbor, now part of the Gateway National Recreation Area.
• C. Patriot missile system
  The Patriot missile system is a long-range, all-altitude, air-defense system designed to detect, track, and intercept incoming aircraft, missiles, and drones, widely used by the U.S. and allied militaries.
• D. Naval Facilities Engineering Systems Command
  Naval Facilities Engineering Systems Command is a United States Navy organization responsible for planning, building, and maintaining naval shore facilities and infrastructure worldwide.
• E. Treasure Island Naval Station (former)
  Treasure Island Naval Station (former) was a decommissioned U.S. Navy base located on San Francisco Bay’s man-made Treasure Island, historically used for training, administration, and support operations.
• F. None of above. chosen