Complex sentence: "Il Pigmalione", a drama in one act (dramma in un atto), is the first opera by Donizetti composed between September and October of 1816, when the composer was 19.
Split into simpler sentences: Il Pigmalione, a drama in one act (dramma in un atto), is the first opera by Donizetti composed. It was written between the September and October of 1816, when the composer was 19.