Complex sentence: Excluding the Gros Ventre (who no longer counted as members), the South Peigan are the only group that chose to settle in Montana, and the other three Blackfoot-speaking peoples and the Sarcee are located in Alberta.
Split into simpler sentences: Excluding the Gros Ventre (who no longer counted as members), the South Peigan are the only group that chose to settle in Montana. The other three Blackfoot-speaking peoples and the Sarcee are located in Alberta.