Complex sentence: On June 13 Schleck announced that he will not start in the 2012 Tour de France because of a fracture of the sacral bone of his pelvis at the Critérium du Dauphiné.
Split into simpler sentences: On June 13 Schleck announced that he will not start in the 2012 Tour de France. The reason for this was a fracture of the sacral bone of his pelvis at the Critérium du Dauphiné.