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: Merrickville Blockhouse | Statement: [Merrickville Locks, hasAdjacentStructure, Merrickville Blockhouse]

Target entity: Merrickville Blockhouse
Context triple: [Merrickville Locks, hasAdjacentStructure, Merrickville Blockhouse]

• A. Fort Kent Blockhouse
  Fort Kent Blockhouse is a historic 19th-century wooden military fortification in Fort Kent, Maine, notable for its role in the Aroostook border dispute between the United States and Britain.
• B. Fort Mississauga
  Fort Mississauga is a historic 19th-century British military fortification located at the mouth of the Niagara River in Niagara-on-the-Lake, Ontario, Canada.
• C. Fort Casimir
  Fort Casimir was a 17th-century Dutch colonial fort on the Delaware River that later became the site of present-day New Castle, Delaware.
• D. Popton Fort
  Popton Fort is a 19th-century coastal artillery fort in Pembrokeshire, Wales, built to defend the Milford Haven Waterway.
• E. Fort Ward
  Fort Ward is a historic waterfront neighborhood and former military installation on Bainbridge Island in Washington State.
• 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: Merrickville Blockhouse
Triple: [Merrickville Locks, hasAdjacentStructure, Merrickville Blockhouse]

Merrickville Blockhouse is a historic 19th-century defensive structure in Merrickville, Ontario, built to protect the Rideau Canal and now preserved as a national historic site.

Target entity: Merrickville Blockhouse
Target entity description: Merrickville Blockhouse is a historic 19th-century defensive structure in Merrickville, Ontario, built to protect the Rideau Canal and now preserved as a national historic site.

• A. Fort Kent Blockhouse
  Fort Kent Blockhouse is a historic 19th-century wooden military fortification in Fort Kent, Maine, notable for its role in the Aroostook border dispute between the United States and Britain.
• B. Fort Mississauga
  Fort Mississauga is a historic 19th-century British military fortification located at the mouth of the Niagara River in Niagara-on-the-Lake, Ontario, Canada.
• C. Fort Casimir
  Fort Casimir was a 17th-century Dutch colonial fort on the Delaware River that later became the site of present-day New Castle, Delaware.
• D. Popton Fort
  Popton Fort is a 19th-century coastal artillery fort in Pembrokeshire, Wales, built to defend the Milford Haven Waterway.
• E. Fort Ward
  Fort Ward is a historic waterfront neighborhood and former military installation on Bainbridge Island in Washington State.
• F. None of above. chosen