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: Summerville Formation | Statement: [Morrison Formation, overlies, Summerville Formation]

Target entity: Summerville Formation
Context triple: [Morrison Formation, overlies, Summerville Formation]

• A. Holston Formation
  The Holston Formation is a geologic unit in eastern Tennessee renowned for its high-quality crystalline limestone commonly marketed as Tennessee marble and widely used in prominent architectural projects.
• B. Kayenta Formation
  The Kayenta Formation is an Early Jurassic sandstone and siltstone rock unit on the Colorado Plateau, renowned for its distinctive red cliffs and important dinosaur fossil trackways.
• C. Salem Limestone formation
  The Salem Limestone formation is a thick, fossil-rich Mississippian-age limestone unit in the U.S. Midwest, widely quarried as a high-quality building stone used in many prominent American structures.
• D. Chinle Formation
  The Chinle Formation is a Late Triassic geologic formation in the southwestern United States, renowned for its colorful badlands, rich fossil beds, and extensive petrified wood deposits.
• E. Morrison Formation
  The Morrison Formation is a vast Late Jurassic sedimentary rock formation in the western United States renowned for its exceptionally rich assemblage of dinosaur fossils, including iconic sauropods and theropods.
• 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: Summerville Formation
Triple: [Morrison Formation, overlies, Summerville Formation]

The Summerville Formation is a Late Jurassic sedimentary rock unit in the western United States, characterized by thin-bedded mudstones and sandstones deposited in tidal flat and coastal environments.

Target entity: Summerville Formation
Target entity description: The Summerville Formation is a Late Jurassic sedimentary rock unit in the western United States, characterized by thin-bedded mudstones and sandstones deposited in tidal flat and coastal environments.

• A. Holston Formation
  The Holston Formation is a geologic unit in eastern Tennessee renowned for its high-quality crystalline limestone commonly marketed as Tennessee marble and widely used in prominent architectural projects.
• B. Kayenta Formation
  The Kayenta Formation is an Early Jurassic sandstone and siltstone rock unit on the Colorado Plateau, renowned for its distinctive red cliffs and important dinosaur fossil trackways.
• C. Salem Limestone formation
  The Salem Limestone formation is a thick, fossil-rich Mississippian-age limestone unit in the U.S. Midwest, widely quarried as a high-quality building stone used in many prominent American structures.
• D. Chinle Formation
  The Chinle Formation is a Late Triassic geologic formation in the southwestern United States, renowned for its colorful badlands, rich fossil beds, and extensive petrified wood deposits.
• E. Morrison Formation
  The Morrison Formation is a vast Late Jurassic sedimentary rock formation in the western United States renowned for its exceptionally rich assemblage of dinosaur fossils, including iconic sauropods and theropods.
• F. None of above. chosen