Nocturnes
... that the third of Claude Debussy's three Nocturnes for orchestra requires a women's chorus to sing wordlessly like sirens?
... that the third of <a href="./Claude_Debussy" id="mwArE" rel="mw:WikiLink" title="Claude Debussy">Claude Debussy</a>'s three <i id="mwArI"><b id="mwArM"><a href="./Nocturnes_(Debussy)" id="mwArQ" rel="mw:WikiLink" title="Nocturnes (Debussy)">Nocturnes</a></b></i> for orchestra requires a women's chorus to sing wordlessly like <a href="./Siren_(mythology)" id="mwArU" rel="mw:WikiLink" title="Siren (mythology)">sirens</a>?