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: Grand Staircase of sedimentary rock layers | Statement: [Grand Staircase–Escalante National Monument, geologicFeature, Grand Staircase of sedimentary rock layers]

Target entity: Grand Staircase of sedimentary rock layers
Context triple: [Grand Staircase–Escalante National Monument, geologicFeature, Grand Staircase of sedimentary rock layers]

• A. Entrada Sandstone
  Entrada Sandstone is a Jurassic-age sedimentary rock formation in the U.S. Southwest, renowned for forming the dramatic natural arches and other erosional landforms seen in places like Arches National Park.
• B. Kaibab Limestone
  Kaibab Limestone is a prominent Permian-age sedimentary rock layer that forms the resistant caprock of the Grand Canyon and many other cliffs and plateaus across the Colorado Plateau.
• C. Bastei rock formations
  The Bastei rock formations are a dramatic sandstone rock massif and popular viewpoint in Germany’s Saxon Switzerland National Park, overlooking the Elbe River and known for its iconic stone bridge and hiking trails.
• D. Straight Cliffs Formation
  The Straight Cliffs Formation is a prominent Late Cretaceous sedimentary rock unit in southern Utah, noted for its extensive cliff-forming sandstones and rich fossil record.
• E. Coconino Sandstone
  Coconino Sandstone is a prominent Permian-age geological formation of well-sorted, cross-bedded sandstone best known from exposures in the Grand Canyon region of the southwestern United States.
• 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: Grand Staircase of sedimentary rock layers
Triple: [Grand Staircase–Escalante National Monument, geologicFeature, Grand Staircase of sedimentary rock layers]

The Grand Staircase of sedimentary rock layers is a vast, step-like sequence of colorful cliffs and plateaus in the American Southwest that preserves an exceptionally complete record of Mesozoic and Cenozoic geologic history.

Target entity: Grand Staircase of sedimentary rock layers
Target entity description: The Grand Staircase of sedimentary rock layers is a vast, step-like sequence of colorful cliffs and plateaus in the American Southwest that preserves an exceptionally complete record of Mesozoic and Cenozoic geologic history.

• A. Entrada Sandstone
  Entrada Sandstone is a Jurassic-age sedimentary rock formation in the U.S. Southwest, renowned for forming the dramatic natural arches and other erosional landforms seen in places like Arches National Park.
• B. Kaibab Limestone
  Kaibab Limestone is a prominent Permian-age sedimentary rock layer that forms the resistant caprock of the Grand Canyon and many other cliffs and plateaus across the Colorado Plateau.
• C. Bastei rock formations
  The Bastei rock formations are a dramatic sandstone rock massif and popular viewpoint in Germany’s Saxon Switzerland National Park, overlooking the Elbe River and known for its iconic stone bridge and hiking trails.
• D. Straight Cliffs Formation
  The Straight Cliffs Formation is a prominent Late Cretaceous sedimentary rock unit in southern Utah, noted for its extensive cliff-forming sandstones and rich fossil record.
• E. Coconino Sandstone
  Coconino Sandstone is a prominent Permian-age geological formation of well-sorted, cross-bedded sandstone best known from exposures in the Grand Canyon region of the southwestern United States.
• F. None of above. chosen