Pourparler
... that no Irish-trained racehorse had won the 1,000 Guineas Stakes in more than five decades until Pourparler did so in 1964?
... that no Irish-trained racehorse had won the <a class="mw-redirect" href="./1,000_Guineas_Stakes" id="mwC1I" rel="mw:WikiLink" title="1,000 Guineas Stakes">1,000 Guineas Stakes</a> in more than five decades until <b id="mwC1M"><a href="./Pourparler_(horse)" id="mwC1Q" rel="mw:WikiLink" title="Pourparler (horse)">Pourparler</a></b> did so in 1964?