Complex sentence: In August, 2007, barely 7 months after the Zakopane accident, Mazoch returned to the slopes and made his first jump and began summer training for the 2008 season.
Split into simpler sentences: In August, 2007, barely 7 months after the Zakopane accident, Mazoch returned to the slopes and made his first jump. The following year he began summer training for the 2008 season.