Act 1 features the aria "Lavami e saro," in which the title character offers a Bible lesson to some of the other characters, while musical highlights of Act 3 include "Ch'ella mi creda," in which one of the characters asks that the title character not be told about how he died, and "Et tu mio trin," after which the title character walks into the sunrise with the man she loves.  
Act 2 of this work begins with a scene featuring Billy and his fianc?, who sings a lullaby to her infant.  Act 1 features the aria "Lavami e saro," in which the title character offers a Bible lesson to some of the other characters, while musical highlights of Act 3 include "Ch'ella mi creda," in which one of the characters asks that the title character not be told about how he died, and "Et tu mio trin," after which the title character walks into the sunrise with the man she loves.  Ashby warns the characters about a gang of thieves, the leader of whom is saved from arrest by Jack Rance after the title character cheats at poker.  FTP, name this work featuring the bandit Mr. Johnson and the owner of the Polka Salooon, Minnie, a 1910 opera by Giacomo Puccini.
Act 2 of this work begins with a scene featuring Billy and his fianc?
The Girl of the Golden West or La Fanciulla del West