dozens of sled dog races
... that dozens of sled dog races have been created since the first organized long-distance sled dog race was held in 1908?
... that <b id="mwB4I"><a href="./List_of_sled_dog_races" id="mwB4M" rel="mw:WikiLink" title="List of sled dog races">dozens of sled dog races</a></b> have been created since the first organized long-distance <a href="./Sled_dog" id="mwB4Q" rel="mw:WikiLink" title="Sled dog">sled dog</a> race was held in 1908?