Complex sentence: Amy Lawrence Lowell (February 9,1874--May 12,1925) was an American poet of the imagist school from Brookline, Massachusetts, who posthumously won the Pulitzer Prize for Poetry in 1926.
Split into simpler sentences: Amy Lawrence Lowell (February 9,1874--May 12,1925) was an American poet of the imagist school from Brookline, Massachusetts. She posthumously won the Pulitzer Prize for Poetry in 1926.