Miss Jummy
... that in 1886, the filly Miss Jummy won the 1,000 Guineas Stakes by one and a half lengths and then defeated the same horse to win the Epsom Oaks by half a length?
... that in 1886, the filly <b id="mwC9U"><a href="./Miss_Jummy" id="mwC9Y" rel="mw:WikiLink" title="Miss Jummy">Miss Jummy</a></b> won the <a class="mw-redirect" href="./1,000_Guineas_Stakes" id="mwC9c" rel="mw:WikiLink" title="1,000 Guineas Stakes">1,000 Guineas Stakes</a> by one and a half <a href="./Horse_length" id="mwC9g" rel="mw:WikiLink" title="Horse length">lengths</a> and then defeated the same horse to win the <a href="./Epsom_Oaks" id="mwC9k" rel="mw:WikiLink" title="Epsom Oaks">Epsom Oaks</a> by half a length?