Complex sentence: The libretto for "Mirette" was written in French by Carré, and some of the music was composed before Weatherly translated and rewrote the lyrics and Greenback did the same for the dialogue.
Split into simpler sentences: The libretto for "Mirette" was written in French by Carré. Some of the music was composed before Weatherly translated and rewrote the lyrics and Greenback translated the dialogue.