Complex sentence: Renoir began his work on the painting in April 1881 and on July 7,1881, it was bought by a known art dealer, Paul Durand-Ruel, for 1,500 francs.
Split into simpler sentences: Renoir began his work on the painting in April 1881. On July 7,1881, it was bought by a known art dealer, Paul Durand-Ruel, for 1,500 francs.