Complex sentence: Emmett's mother was born to John and Alma Carthan in the small Delta town of Webb, Mississippi "the Delta" being the traditional name for the area of northwestern Mississippi at the confluence of the Yazoo and Mississippi Rivers.
Split into simpler sentences: Emmett's mother was born to John and Alma Carthan in the small Delta town of Webb, Mississippi. The Delta region emcompasses the area of northwestern Mississippi at the confluence of the Yazoo and Mississippi Rivers.