Complex sentence: A golden belt was fastened tightly around her waist and in spite of all the efforts of her mother she badly burned her hands and even her chest-it was impossible to unfasten the belt and to take off the burning dress.
Split into simpler sentences: A golden belt was fastened tightly around her waist and in spite of all the efforts of her mother she badly burned her hands and even her chest. It was impossible to unfasten the belt and to take off the burning dress.