Original sentence: Because of the difficulty of delivering supplies from elsewhere, the missions had to become self-sufficient in relatively short order.Fray Juan Crespi, a Franciscan missionary travelling with the expedition, noted in his diary that the camp was "at the foot of the mountains".In 1769, the Spanish Portola expedition, first Europeans to see inland areas of California, traveled north through the San Fernando Valley on August 7 and camped at a watering place near where the mission was later established.In 1842, six years before the California Gold Rush, a brother of the mission mayordomo (foreman) made the first Alta California gold discovery in the foothills near the mission.In memory of that discovery, the place was given the name Placerita Canyon, but only small quantities of gold were found.The goals of the missions were, first, to convert the natives to Christianity and, second, to turn them into good Spanish colonists.The mission was founded on September 8, 1797, and was the seventeenth of the twenty-one Spanish missions established in Alta California.Toward that end, neophytes were taught European-style farming, animal husbandry, mechanical arts and domestic crafts
Edited sentence: By 1811, the natives produced all of the food at the missions, and sustained the military and civil government of California.The Spanish did not understand the culture of the local natives, and in any case they intended that the natives conform to the plans of the mission, that they be taught about European agricultural practices, the mechanical arts, and the raising and care of livestock.The goal of the missions was, above all, to become self-sufficient in relatively short order.The mission was founded on September 8, 1797, near the site of the first gold discovery in Alta California, and was the seventeenth of the Spanish missions established in present day California.[Farming], therefor, was the most important [facts] of any mission.↓===Mission industries===