Complex sentence: Less than three weeks later, in stage 3 of the 2013 Vuelta a Espana, Horner attacked over the last kilometer to win the stage and take the overall lead in the race.
Split into simpler sentences: Less than three weeks later, in stage 3 of the 2013 Vuelta a Espana. Chris attacked over the last kilometer to win the stage and take the overall lead in the race.