Complex sentence: William De Witt Snodgrass (January 5 1926--January 13 2009), pseudonym S. S. Gardons, was an American poet and a 1960 Pulitzer Prize for Poetry winner.
Split into simpler sentences: William De Witt Snodgrass (January 5 1926--January 13 2009) was an American poet under the pseudonym S. S. Gardons. He was a 1960 Pulitzer Prize for Poetry winner.