Complex sentence: Historically and according to popular belief, Chuseok originates from "Gabae" started during the reign of the third king of the kingdom of Silla (57 BC-AD 935), when it was a month-long weaving contest between two teams.
Split into simpler sentences: Historically and according to popular belief, Chuseok originates from "Gabae". Gabae started during the reign of the third king of the kingdom of Silla (57 BC-AD 935), when it was a month-long weaving contest between two teams.