Complex sentence: On October 8,2011 at her second event, in Milan, Italy, she suffered a season-ending injury on the opening jump in the long program--a piece of bone detached from the tibia in her right leg.
Split into simpler sentences: On October 8,2011 at her second event, in Milan, Italy, she suffered a season-ending injury on the opening jump in the long program. A piece of bone detached from the tibia in her right leg.