Question: What is the name of this national anthem written after the declaration of war against Austria that Guiseppe Verdi's Inno delle nazioni incorporates with other national anthems?
Sentence (from "Inno delle nazioni"): It was the first collaboration between the composer and Arrigo Boito, who, much later, would revise the libretto of "Simon Boccanegra" and write the original libretti of "Otello" and "Falstaff".
Relevant evidence: No