Complex sentence: Some Native Americans in its limited range learned traditional ways of using it: the Cahuilla pepared the drupe as a delicacy and the Kawaiisu found the tough twigs useful as drills in starting fires and as the front portion of arrow shafts.
Split into simpler sentences: Some Native Americans in its limited range learned traditional ways of using it: the Cahuilla pepared the drupe as a delicacy. The Kawaiisu found the tough twigs useful as drills in starting fires and as the front portion of arrow shafts.