premise: "Pirate Jenny" (German: "Seeräuber-Jenny ") is a well-known song from "The Threepenny Opera" by Kurt Weill, with lyrics by Bertolt Brecht. The English lyrics are by Marc Blitzstein. It is probably the second most famous song in the opera, after "Mack the Knife".
hypothesis: Mack the Knife is not the most famous song in the opera.
reason: Mack the Knife is the most famous song in the opera followed by Pirate Jenny. The word probably confuses the system.