Complex sentence: Its libretto was by the author Ignaz Schnitzer and in turn was based on "Sáffi" by Mór Jókai.composer's lifetime, the operetta enjoyed great success, second only to the popularity of "Die Fledermaus".
Split into simpler sentences: Its libretto was by the author Ignaz Schnitzer and in turn was based on "Sáffi" by Mór Jókai. During the composer's lifetime, the operetta enjoyed great success, second only to the popularity of "Die Fledermaus".