Complex sentence: The family remained there until April of 1859, when they sold the farm and moved to Westford, where they opened a store so Ellen could attend Westford Academy in order to obtain an academy education and still help out with the store and home chores.
Split into simpler sentences: The family remained there until April of 1859, when they sold the farm and moved to Westford. There, they opened a store so Ellen could attend Westford Academy in order to obtain an academy education and still help out with the store and home chores.