Complex sentence: He wrote "librettos" for Venice, Vienna and Piacenza theaters; he also adapted Moniglia's Florentine extravaganza Ipermestra to Venetian taste as "La costanza trionfante".
Split into simpler sentences: He wrote "librettos" for Venice, Vienna and Piacenza theaters. He also adapted Moniglia's Florentine extravaganza Hipermestra to Venetian taste as "La costanza trionfante".