Complex sentence: He returned four years later in Turin for the 2006 edition where he competed in the seated skiing events again failing to finish in the slalom but picking up a 40th place in the giant slalom.
Split into simpler sentences: He returned four years later in Turin for the 2006 edition, where he competed in the seated skiing events. However, he again failed to finish in the slalom, but picked up a 40th place in the giant slalom.