Complex sentence: The song was published as a salon song for solo soprano and piano in 1881, nine years before "Mala Pasqua" premiered, and copies of the score (and libretto) for "Mala Pasqua" published by Ricordi in 1890 are held in several libraries.
Split into simpler sentences: The song was published as a salon song for solo soprano and piano in 1881, nine years before "Mala Pasqua" premiered. Full copies of the score for "Mala Pasqua" are held in several libraries.