Prince Luigi Amedeo, Duke of the Abruzzi
He is known for his Arctic explorations and for his mountaineering expeditions , particularly to Mount Saint Elias ( Alaska–Yukon ) and K2 ( Pakistan–China ) . 
<triplet> Mount Saint Elias <subj> Alaska <obj> located in the administrative territorial entity <subj> Yukon <obj> located in the administrative territorial entity <triplet> Alaska <subj> Yukon <obj> shares border with <triplet> K2 <subj> Pakistan <obj> country <triplet> Pakistan <subj> China <obj> shares border with