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: Colorado River region | Statement: [Chemehuevi Reservation, locatedIn, Colorado River region]

Target entity: Colorado River region
Context triple: [Chemehuevi Reservation, locatedIn, Colorado River region]

• A. Colorado River Basin
  The Colorado River Basin is the vast watershed in the western United States and northern Mexico that collects and channels water from multiple states and tributaries into the Colorado River, supporting major ecosystems, agriculture, and cities across an arid region.
• B. Lower Colorado River region chosen
  The Lower Colorado River region is an area along the lower course of the Colorado River in the southwestern United States and northwestern Mexico, traditionally inhabited by Indigenous peoples whose cultures and languages are part of the Yuman language family.
• C. Arkansas River region
  The Arkansas River region is a historic and culturally significant area in the central United States shaped by the course of the Arkansas River, long serving as a corridor for Indigenous peoples, trade, and settlement.
• D. Great Basin–Colorado River transition area
  The Great Basin–Colorado River transition area is a geographic region where the ecosystems and cultural territories of the Great Basin and Colorado River Plateau overlap and blend.
• E. Rio Grande basin
  The Rio Grande basin is the extensive watershed of the Rio Grande River, draining parts of Colorado, New Mexico, Texas, and northern Mexico into the Gulf of Mexico.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.