For 10 points, name this opera in which Frederic works for the titular band of ship raiders, by Gilbert and Sullivan.
One character in this opera frightens a group of policemen led by the Sergeant by singing "Go, ye heroes, and die!" After being challenged in the name of Queen Victoria, a group in this work decides not to kill the Major-General, whose daughter Mabel is spotted on a beach by this opera's protagonist. Because Ruth misheard the word "pilot," the protagonist of this work is forced into an occupation until his twenty-first birthday, but his release from that position is cut short once it is revealed that he was born on a leap day. For 10 points, name this opera in which Frederic works for the titular band of ship raiders, by Gilbert and Sullivan.
One character in this opera frightens a group of policemen led by the Sergeant by singing "Go, ye heroes, and die!"
The Pirates of Penzance; or, The Slave of Duty