Complex sentence: Today the Oneida Indian Nation owns tribal land in Verona, Oneida, and Canastota, New York, on which it operates a number of businesses, including a resort with a Class III gambling casino.
Split into simpler sentences: Today the Oneida Indian Nation owns tribal land in Verona, Oneida, and Canastota, New York, on which it operates a number of businesses. These include a resort with a Class III gambling casino.