Question: What year was the rock musical, in which Michael Greif was the stage director, released?
Sentence (from "Toussaint-Eugène-Ernest Mocker"): In his 30 year career as a principal singer at the Théâtre Impérial de l'Opéra-Comique he created numerous roles in the company's world premieres and from 1860 served as a stage director there.
Relevant evidence: No