Complex sentence: Leo Garel (1917 in Brooklyn, New York--July 4,1999) was an American artist, who lived the later part of his life in Stockbridge, Massachusetts up until his death from cancer.
Split into simpler sentences: Leo Garel (1917 in Brooklyn, New York--July 4,1999) was an American artist. He lived the later part of his life in Stockbridge, Massachusetts up until his death from cancer.