Complex sentence: Born in Market Weighton, in the East Riding of Yorkshire, William was the fourth son in a family of thirteen, his siblings and mother were all of average size, whereas his father measured only 5 feet 9 inches.
Split into simpler sentences: Born in Market Weighton, in the East Riding of Yorkshire, William was the fourth son in a family of thirteen. His siblings and mother were all of average size, whereas his father measured only 5 feet 9 inches.