Complex sentence: In November 1836 Marguerite, her children; her sister and other descendants of Marie Jean Scypion, her mother, finally won their case as free people of color, based on their maternal descent from a Natchez woman, by a unanimous jury decision in Jefferson County.
Split into simpler sentences: In November 1836 Marguerite, her children; her sister and other descendants of Marie Jean Scypion, her mother, finally won their case as free people of color. The unanimous jury decision in their favor was based on their maternal descent from a Natchez woman, and decided in Jefferson County.