Complex sentence: Valery Rozov is a Russian BASE jumper., who on May 5,2013, jumped off Changtse (the north peak of the Mount Everest massif) from a height of 7,220 metres (23,690 ft).
Split into simpler sentences: Valery Rozov is a Russian BASE jumper., who on May 5,2013, jumped off Mt. Everest's north face from a height of 7,220 metres (23,690 ft).