Original: In 1905, Cortot formed a trio with Jacques Thibaud and Pablo Casals, which established itself as the leading piano trio of its era, and probably of any era.
Simplified: He formed a piano trio with the violinist Jacques Thibaud and the cellist Pablo Casals. In 1905, Cortot formed a trio with Jacques Thibaud and Pablo Casals, which became the most famous piano trio of the time.