Christmas carol
... that in Wales, there is one Christmas carol that is traditionally sung only by men?
... that in <a href="./Wales" id="mwAjU" rel="mw:WikiLink" title="Wales">Wales</a>, there is one <b id="mwAjY"><a href="./Plygain" id="mwAjc" rel="mw:WikiLink" title="Plygain">Christmas carol</a></b> that is traditionally sung only by men?