Complex sentence: IPC Alpine Skiing, IPC Biathlon, IPC Cross-Country skiing and IPC Ice Sledge Hockey with sit-skiing being introduced as another event in both the Alpine and Nordic skiing competitions.
Split into simpler sentences: IPC Alpine Skiing, IPC Biathlon, IPC Cross-Country skiing and IPC Ice Sledge Hockey. Sit-skiing was introduced as another event in both the Alpine and Nordic skiing competitions.