Question: Which American rock climber responsible for locating the body of George Mallory on Everest failed in his attempt to climb over the west ridge of Mount Epperly?
Sentence (from "Mallory and Irvine Research Expedition"): The goal of the Mallory and Irvine Research Expedition of 1999 was to discover evidence of whether George Mallory and Andrew Irvine had been the first to summit Mount Everest in their attempt of 8–9 June 1924.
Relevant evidence: No