Complex sentence: As the field left for the second circuit, only seven horses remained: the eventual winner Red Marauder, the 2000 winner Papillon, Beau, Blowing Wind, Brave Highlander, Unsinkable Boxer and Smarty.
Split into simpler sentences: As the field left for the second circuit, only seven horses remained. These included the eventual winner Red Marauder, the 2000 winner Papillon, Beau, Blowing Wind, Brave Highlander, Unsinkable Boxer and Smarty.