Complex sentence: In the 1996 WSM's final event (Power Stairs) Kiri was about to go head to head with Magnus Ver Magnusson, however just after the starter's whistle Kiri dropped out, due to another ankle injury.
Split into simpler sentences: In the 1996 WSM's final event (Power Stairs) Kiri was about to go head to head with Magnus Ver Magnusson. However, just after the starter's whistle, Kiri dropped out due to another ankle injury.