Complex sentence: By the mid- 1940s, Mouly's art began to gain notoriety from his peers and collectors; in 1945 his paintings were exhibited alongside the paintings of Matisse in the Salon d'Automne in Paris.
Split into simpler sentences: By the mid- 1940s, Mouly's art began to gain notoriety from his peers and collectors. In 1945, his paintings were exhibited alongside the paintings of Matisse in the Salon d'Automne in Paris.