Complex sentence: In 1891 Lombardini painted a portrait of Emma Zilli, the interpreter of Alice Ford's role in the work of Verdi's Falstaff, who had sung the soprano role during a concert held in Udine.
Split into simpler sentences: In 1891 Lombardini painted a portrait of Emma Zilli, the interpreter of Alice Ford's role in the work of Verdi's Falstaff. Zilli sang the soprano role during a concert held in Udine.