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: Kentish ragstone | Statement: [Tower of London, material, Kentish ragstone]

Target entity: Kentish ragstone
Context triple: [Tower of London, material, Kentish ragstone]

• A. Collyhurst sandstone
  Collyhurst sandstone is a distinctive red Triassic sandstone historically quarried in Manchester, England, and widely used in local building and architectural stonework.
• B. Portland stone
  Portland stone is a durable, fine-grained limestone from the Isle of Portland in Dorset, England, widely used as a prestigious building material in British architecture.
• C. Bedford limestone
  Bedford limestone is a high-quality, fine-grained building stone from southern Indiana widely used in prominent architectural landmarks across the United States.
• D. Millstone Grit
  Millstone Grit is a coarse-grained Carboniferous sandstone formation in northern England, notably forming the rugged moorland landscapes of the Pennines.
• E. Tuckahoe marble
  Tuckahoe marble is a high-quality white to gray dolomitic marble historically quarried in Westchester County, New York, widely used in prominent 19th-century American buildings and monuments.
• 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: Kentish ragstone
Triple: [Tower of London, material, Kentish ragstone]

Kentish ragstone is a hard, grey limestone from Kent, England, historically quarried for major building works including many medieval fortifications and churches.

Target entity: Kentish ragstone
Target entity description: Kentish ragstone is a hard, grey limestone from Kent, England, historically quarried for major building works including many medieval fortifications and churches.

• A. Collyhurst sandstone
  Collyhurst sandstone is a distinctive red Triassic sandstone historically quarried in Manchester, England, and widely used in local building and architectural stonework.
• B. Portland stone
  Portland stone is a durable, fine-grained limestone from the Isle of Portland in Dorset, England, widely used as a prestigious building material in British architecture.
• C. Bedford limestone
  Bedford limestone is a high-quality, fine-grained building stone from southern Indiana widely used in prominent architectural landmarks across the United States.
• D. Millstone Grit
  Millstone Grit is a coarse-grained Carboniferous sandstone formation in northern England, notably forming the rugged moorland landscapes of the Pennines.
• E. Tuckahoe marble
  Tuckahoe marble is a high-quality white to gray dolomitic marble historically quarried in Westchester County, New York, widely used in prominent 19th-century American buildings and monuments.
• F. None of above. chosen