Complex sentence: The story is based upon the Mexican urban legend of La Lorna, which began in Aztec mythos where the goddess Cihuacoatl was said to have taken the form of a beautiful lady draped in white garments to predeict the death of her children.
Split into simpler sentences: The story is based upon the Mexican urban legend of La Lorna. The legend began in Aztec mythos where the goddess Cihuacoatl was said to have taken the form of a beautiful lady draped in white garments to predeict the death of her children.