Griselda
... that Vivaldi's opera Griselda is based on the folklore character Griselda as told by Giovanni Boccaccio in the The Decameron?
... that <a href="./Antonio_Vivaldi" id="mwAt4" rel="mw:WikiLink" title="Antonio Vivaldi">Vivaldi</a>'s <a href="./Opera" id="mwAt8" rel="mw:WikiLink" title="Opera">opera</a> <i id="mwAuA"><b id="mwAuE"><a href="./Griselda_(Vivaldi)" id="mwAuI" rel="mw:WikiLink" title="Griselda (Vivaldi)">Griselda</a></b></i> is based on the folklore character <a href="./Griselda_(folklore)" id="mwAuM" rel="mw:WikiLink" title="Griselda (folklore)">Griselda</a> as told by <a href="./Giovanni_Boccaccio" id="mwAuQ" rel="mw:WikiLink" title="Giovanni Boccaccio">Giovanni Boccaccio</a> in the <i id="mwAuU"><a href="./The_Decameron" id="mwAuY" rel="mw:WikiLink" title="The Decameron">The Decameron</a></i>?