Complex sentence: The 2006 Winter Olympics in Turin, Italy marked the Winter Games debut of Ethiopia and Madagascar, and the 2010 Games in Vancouver, Canada saw the debut of the Cayman Islands, Colombia, Peru, and Ghana.
Split into simpler sentences: The 2006 Winter Olympics in Turin, Italy marked the Winter Games debut of Ethiopia and Madagascar. The 2010 Games in Vancouver, Canada saw the debut of the Cayman Islands, Colombia, Peru, and Ghana.