Complex sentence: He complemented his studies in music in the years 1929-1931 in Paris, where he met many composers of his time such as Sergei Prokofiev, George Enesco and Arthur Honegger, and studied composition with Nadia Boulanger and orchestration with Paul Dukas.
Split into simpler sentences: He complemented his studies in music in the years 1929-1931 in Paris, where he met many composers of his time such as Sergei Prokofiev, George Enesco and Arthur Honegger. There he studied composition with Nadia Boulanger and orchestration with Paul Dukas.