Original sentence: According to one theory the Incas of Peru, who had failed to conquer the Araucanians, called the valley of the Aconcagua "Chili" by corruption of the name of a tribal chief ("cacique") called Tili, who ruled the area at the time of the Incan conquest
Edited sentence: According to one theory the Incas of Peru called the valley of the Aconcagua "Chili" by corruption of the name of a tribal chief ("cacique") called Tili, who ruled the area at the time of the Incan conquest