Complex sentence: Charles Sheeler (July 16,1883--May 7,1965) is recognized as one of the founders of American modernism and one of the master photographers of the 20th century.
Split into simpler sentences: Charles Sheeler (July 16,1883--May 7,1965) was an American artist. He is recognized as one of the founders of American modernism and one of the master photographers of the 20th century.