Fiorello Giraud created a roll in an opera that had how many acts?
two acts
Title: L'ajo nell'imbarazzo
Passage: L'ajo nell'imbarazzo (The Tutor Embarrassed or The Tutor in a Jam) is a "melodramma giocoso", or opera, in two acts by Gaetano Donizetti.  The Italian libretto was written by Jacopo Ferretti, after the 1807 play by Giovanni Giraud.  At its premiere at the Teatro Valle, Rome on 4 February 1824, it "was greeted with wild enthusiasm [and] it was with this opera that [...] Donizetti had his first really lasting success" During revisions planned for the 1826 production in Naples, Donizetti renamed the opera Don Gregorio, and it is under that name that most later productions were staged.
Title: Pagliacci
Passage: Pagliacci (] ; literal translation, "Clowns") is an Italian opera in a prologue and two acts, with music and libretto by Ruggero Leoncavallo.  It is the only Leoncavallo opera that is still widely performed.  Opera companies have frequently staged "Pagliacci" with "Cavalleria rusticana" by Mascagni, a double bill known colloquially as 'Cav and Pag'.
Title: Fiorello Giraud
Passage: Fiorello Giraud (22 October 1870 – 28 March 1928) was an Italian operatic tenor who sang leading roles in many Italian opera houses during the course of his career, including La Scala, the Teatro Regio di Parma, and the Teatro Regio di Torino, as well as in Spain, Portugal, and Latin America.  He is remembered today for having created the role of Canio in the world premiere of Leoncavallo's "Pagliacci".
Pagliacci Fiorello Giraud