Complex sentence: Another source is the French vaudeville play', by Henri Meilhac and Ludovic Halévy, which was first translated by Karl Haffner into a non-musical play to be produced in Vienna.
Split into simpler sentences: Another source is a French vaudeville play,', by Henri Meilhac and Ludovic Halévy. This was first translated by Karl Haffner into a non-musical play to be produced in Vienna.