Marita Napier
... that Marita Napier is the first South African opera singer to have performed lead roles in each of the four "Grand Slam" opera houses?
... that <b id="mwBfE"><a href="./Marita_Napier" id="mwBfI" rel="mw:WikiLink" title="Marita Napier">Marita Napier</a></b> is the first South African opera singer to have performed lead roles in each of the four "Grand Slam" opera houses?