Complex sentence: The Sac and Fox Tribe of Missouri separated from the main band in the 1830's and has 360 members and a 61.226 km² (23.639 sq mi) tract in southeastern Richardson County, Nebraska and northeastern Brown County, Kansas, near Falls City, Nebraska.
Split into simpler sentences: The Sac and Fox Tribe of Missouri separated from the main band in the 1830's. Today 360 members live on a reservation comprised 61.226 km² (23.639 sq mi) tract in southeastern Richardson County, Nebraska and northeastern Brown County, Kansas, near Falls City, Nebraska.