Complex sentence: A Betty Boop cartoon, "Parade of the Wooden Soldiers", was created with the music in 1933; and since 1933 The Rockettes have been performing their own choreographed version of the piece in the annual Radio City Christmas Spectacular.
Split into simpler sentences: A Betty Boop cartoon, "Parade of the Wooden Soldiers", was created with the music in 1933. Also in 1933, The Rockettes began annually performing their own choreographed version of the piece in their Radio City Christmas Spectacular.