Question: Who wrote the music for the play in which Morag McLaren played Carlotta?
Sentence (from "The Phantom of the Opera (1986 musical)"): Based on the French novel "Le Fantôme de l'Opéra" by Gaston Leroux, its central plot revolves around a beautiful soprano, Christine Daaé, who becomes the obsession of a mysterious, disfigured musical genius living in the subterranean labyrinth beneath the Opera Garnier.
Relevant evidence: No