Question: MGM Records produced a 1954 revival of an off-Broadway musical; what is the name of opera this musical was adapted from?
Sentence (from "MGM Records"): The company also released soundtrack albums of the music for some of their non-musical films as well, and on rare occasions, cast albums of off-Broadway musicals such as "The Fantasticks" and the 1954 revival of "The Threepenny Opera".
Relevant evidence: Yes