Complex sentence: Robert Creeley (May 21,1926-March 30 2005) was an American poet, author of more than sixty books, and usually associated with the Black Mountain poets, though his verse aesthetic diverged from that school's.
Split into simpler sentences: Robert Creeley (May 21,1926-March 30 2005) was an American poet and author of more than sixty books. He is usually associated with the Black Mountain poets, though his verse aesthetic diverged from that school's.