Complex sentence: Rienda won the last two giant slaloms of the 2005 season, the first victory for a Spanish ski racer since Blanca Fernández Ochoa in 1991.
Split into simpler sentences: Rienda won the last two giant slaloms in the 2004/05 season. This was the first victory for a Spanish skier since Blanca Fernández Ochoa in 1991.