Beginning in the late 1970s she began to tackle soprano roles , including Selika in `` L'Africaine `` , Judith in Bartók 's `` Bluebeard 's Castle `` , Lady Macbeth `` Macbeth `` , Madame Lidoine in Poulenc 's `` Dialogues of the Carmelites `` ( Met1977 ) , Tosca , Norma ( from Boston 1976 till Messina 1989 ) , Aida ( Boston 1980 and 1989 ) , Desdemona ( `` Otello `` ) ( 1981 ) , Leonore ( `` Fidelio `` ) ( Met 1983 ) , Iphigénie ( 1984–85 ) , Alceste ( 1985 ) , Médée ( Cherubini ) ( 1986 ) .
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