Complex sentence: Pascal-Adolphe-Jean Dagnan-Bouveret (January 7,1852--July 3,1929), was one of the leading French artists of the naturalist school and painted several paintings depicting Brittany.
Split into simpler sentences: Pascal-Adolphe-Jean Dagnan-Bouveret (January 7,1852--July 3,1929), was one of the leading French artists of the naturalist school. He became one of the leading French artists of the naturalist school and painted several paintings depicting Brittany.