Complex sentence: The ballet project came to an end with Diaghilev's death on 19 August 1929, but Markevitch's compositions were accepted by the publisher Schott and he continued to produce at least one major work per year during the 1930s.
Split into simpler sentences: The ballet project came to an end with Diaghilev's death on 19 August 1929, but Markevitch's compositions were accepted by the publisher Schott. He continued to produce at least one major work per year during the 1930s.