Complex sentence: Today the population has recovered somewhat and there are about 2,500 Wintun, many of whom live on the Round Valley Reservation, and on the Colusa, Cortina, Grindstone Creek, Redding, and Rumsey rancherias.
Split into simpler sentences: Today the population has recovered somewhat and there are about 2500 Wintun. Many live on the Round Valley Reservation, and on the Colusa, Cortina, Grindstone Creek, Redding, and Rumsey rancherias.