1973 Belmont Stakes
... that the 1973 Belmont Stakes was won by Secretariat, whose 31-length lead was the largest margin of victory in the history of the race?
... that the <b id="mwBIo"><a href="./1973_Belmont_Stakes" id="mwBIs" rel="mw:WikiLink" title="1973 Belmont Stakes">1973 Belmont Stakes</a></b> was won by <a href="./Secretariat_(horse)" id="mwBIw" rel="mw:WikiLink" title="Secretariat (horse)">Secretariat</a>, whose 31-length lead was the largest margin of victory in the history of the race?