A comic opera composed in 1917–18 contains an aria sung by who? 
Gianni Schicchi: Gianni Schicchi (] ) is a comic opera in one act by Giacomo Puccini to an Italian libretto by Giovacchino Forzano, composed in 1917–18. Gianni Schicchi:  The aria "O mio babbino caro" is one of Puccini's best known, and one of the most popular arias in opera.
i don't know