Complex sentence: A three-year old boy climbed the wall around her zoo enclosure and fell 18 feet onto concrete below, rendering him unconscious with a broken hand and a vicious gash on the side of his face.
Split into simpler sentences: A three-year old boy climbed the wall around her zoo enclosure and fell 18 feet onto concrete below, rendering him unconscious. With a broken hand and a vicious gash on the side of his face.