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: Big Sioux River | Statement: [Iowa–South Dakota border, hasHydrologicalFeature, Big Sioux River]

Target entity: Big Sioux River
Context triple: [Iowa–South Dakota border, hasHydrologicalFeature, Big Sioux River]

• A. Big Sioux River chosen
  The Big Sioux River is a major tributary of the Missouri River that flows through eastern South Dakota and northwestern Iowa, shaping the region’s landscape and serving as an important natural and recreational resource.
• B. Minnesota River
  The Minnesota River is a major tributary of the Mississippi River in southern Minnesota, flowing through agricultural and prairie landscapes before joining the Mississippi near the Twin Cities.
• C. Assiniboine River
  The Assiniboine River is a major prairie river in Western Canada that flows through Saskatchewan and Manitoba before joining the Red River at Winnipeg.
• D. Yellowstone River
  The Yellowstone River is a major free-flowing river in the western United States that originates in Yellowstone National Park and flows through Wyoming, Montana, and North Dakota before joining the Missouri River.
• E. Assiniboine
  The Assiniboine are a Native American/First Nations people of the Northern Plains, closely related to the Sioux and historically known as nomadic bison hunters and traders across what is now the northern United States and southern Canada.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.