Mercedes Gleitze
... that Mercedes Gleitze had to attempt to swim the English Channel again to prove she had already done it?
... that <b id="mwCqA"><a href="./Mercedes_Gleitze" id="mwCqE" rel="mw:WikiLink" title="Mercedes Gleitze">Mercedes Gleitze</a></b> had to attempt to swim the <a href="./English_Channel" id="mwCqI" rel="mw:WikiLink" title="English Channel">English Channel</a> again to prove she had already done it?