Complex sentence: Henri Casadesus (September 30,1879--May 31,1947) was a violist and music publisher who founded the Society of Ancient Instruments with Camille Saint-Saëns in 1901.
Split into simpler sentences: Henri Casadesus (September 30,1879--May 31,1947) was a violist and music publisher. He founded the Society of Ancient Instruments with Camille Saint-Saëns in 1901.