Complex sentence: It combines documentary footage with dramatized recreations of the events of the 2008 K2 disaster, during which-on the way to and from the summit-11 climbers died during a short time span, creating one of the worst catastrophes in climbing history.
Split into simpler sentences: It combines documentary footage with dramatized recreations of the events of the 2008 K2 disaster. On the way to and from the summit, eleven climbers died during a short time span creating one of the worst catastophes in climbing history.