Midnight Sun
... that the champion stallion Midnight Sun was ridden by children?
... that the champion <a href="./Stallion" id="mwBtw" rel="mw:WikiLink" title="Stallion">stallion</a> <b id="mwBt0"><a href="./Midnight_Sun_(horse)" id="mwBt4" rel="mw:WikiLink" title="Midnight Sun (horse)">Midnight Sun</a></b> was ridden by children?