Complex sentence: The second version that is performed with regularity is the choreographer George Balanchine's version, given under the title "Harlequinade", originally staged for the New York City Ballet in 1965.
Split into simpler sentences: The second version that is performed with regularity is the choreographer George Balanchine staging, given under the title "Harlequinade". This version was originally staged for the New York City Ballet in 1965.