Salvatore Allegra
He composed a number of operettas in the 1920s , including "Il gatto in cantina" ( 1930 ) , which is still performed sometimes , passing then to operas , such as the dark "verista" drama "Ave Maria" , which was first staged at La Scala in 1934 , which was followed by "I Viandanti" ( 1936 ) , "Il Medico suo malgrado" ( 1938 ) and "Romulus" ( 1952 ) . 
<triplet> verista <subj> opera <obj> subclass of <triplet> La Scala <subj> opera <obj> use