Original: Schnabel also played with a number of other famous musicians including the violinist Joseph Szigeti and the cellists Pablo Casals and Pierre Fournier.
Simplified: Some of the famous musicians he played chamber music with were Carl Flesch, Joseph Szigeti and Bronislaw Huberman (violin), Paul Hindemith (viola), and Pablo Casals, Gregor Piatigorsky and Pierre Fournier (cello).