This April 3, 2017 photo released by the Metropolitan Opera shows Guenther Groissboeck, left, and Renee Fleming during a performance Richard Strauss' "Der Rosenkavalier," in New York. (Ken Howard/Metropolitan Opera via AP)
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This April 3, 2017 photo released by the Metropolitan Opera shows Guenther Groissboeck, left, and Renee Fleming during a performance Richard Strauss' "Der Rosenkavalier," in New York. (Ken Howard/Metropolitan Opera via AP)
