Question: Who provided the German libretto to the composition by a man whose best known work is "The Threepenny Opera," which proved to be their last major collaboration?
Sentence (from "Kurt Weill"): Kurt Julian Weill (March 2, 1900April 3, 1950) was a German composer, active from the 1920s in his native country, and in his later years in the United States.
Relevant evidence: No