Assertion: contralto's role | /r/HasProperty | stereotypical triad
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text: Typical roles for mezzo-sopranos include the stereotypical triad associated with contraltos of "witches, bitches, and britches": witches, nurses, and wise women, such as Azucena in Verdi's Il trovatore; villains and seductresses such as Amneris in Verdi's Aida; and "breeches roles" or "trouser roles" (