Question: Who produce 80 to 90 percent of the text to the opera at which Timothy Meyers has a role of Bertolt Brecht's? 
Sentence (from "Timothy Meyers"): Timothy Meyers (August 31, 1945—March 14, 1989) was an American actor famous for originating the role of Kenickie in Grease and was a 1972 nominee for Tony Award Best Featured Actor in a Musical.
Relevant evidence: No