article_snippet.sent: Their quest to climb Everest last year was thwarted following the deaths of 16 Sherpa guides in April when an avalanche swept down .
article_snippet.sent: Mount Everest quest last year was thwarted following the deaths of 16 Sherpa guides in April, the beginning of the climbing season, when an avalanche swept down.
highlights_snippet.sent: he quest to climb Everest last year was thwarted following the deaths of 16 Sherpa guides in April when an avalanche swept down .