Question: Who is the rare adult male American Opera singer who is able to sing as a sopranist?
Sentence (from "Sopranist"): In rare cases an adult man may be able to sing in the soprano range using his normal or modal voice and not falsetto due to endocrinological reasons, like Radu Marian, or as a result of a larynx that has not completely developed as in the case of Michael Maniaci.
Relevant evidence: Yes