Claim: Georg Jarno wrote operettas but never wrote any operas, two of them had good reviews but four others did not.
Evidence: Before operettas, he wrote three operas: Die schwarze Kaschka (1895), Der Richter von Zalamea (1899) based on Calderon's El alcalde de Zalamea, and Der zerbrochne Krug (1903) based on Heinrich von Kleist's play; none prevailed.