Missouri River Trench
The Missouri River Trench is the geological name applied to the broad valley of the Missouri River as it flows southward through North Dakota and South Dakota in the United States . 
<triplet> North Dakota <subj> South Dakota <obj> shares border with <subj> United States <obj> country <triplet> South Dakota <subj> Missouri River <obj> located in or next to body of water <subj> North Dakota <obj> shares border with <subj> United States <obj> country <triplet> United States <subj> North Dakota <obj> contains administrative territorial entity <subj> South Dakota <obj> contains administrative territorial entity