Complex sentence: Disagreements arise during the rehearsals for Schubert's latest opera, as the singer of the leading part considers the music too difficult to sing; music publishers Tobias Haslinger and Anton Diabelli reject his music.
Split into simpler sentences: Disagreements arise during the rehearsals for Schubert's latest opera, as the singer of the leading part considers the music too difficult to sing. Music publishers Tobias Haslinger and Anton Diabelli reject his music.