Complex sentence: By 1872 all the Timpanogos had moved to the Uintah and Ouray Indian Reservation, but some occasionally returned to fish on Utah Lake into the 1920s.
Split into simpler sentences: By 1872 all the Timpanogos had moved to the Uintah and Ouray Indian Reservation. However, some Timpanogos occasionally returned to fish on Utah Lake into the 1920s.