You will be given a definition of a task first, then some input of the task.
In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].

(CNN) In 2004, Mostafa Salameh had a vivid dream: he was praying for peace on the top of a mountain. "I woke up sweating and I saw myself on top of the world," Salameh tells CNN. Back then, Salameh had no expedition experience, little money and couldn't have pointed to Mount Everest on a map. Fast forward to 2017, and he has become the first Jordanian to complete the "Explorers Grand Slam," which entails climbing the Seven Summits, including Mount Everest, and reaching the North and South poles. Only 15 other people have ever achieved the Grand Slam. His amazing life has now become the subject of an international book, published by Bloomsbury and endorsed by King Abdullah II of Jordan and British adventurer Ranulph Fiennes.Mostafa Salameh has become the first Jordanian to climb the Seven Summits, and trek to both the North and South polesHe has released a book "Dreams of a Refugee: From the Middle East to Mount Everest" detailing his adventures 
 Question:Almost immediately afterward, Salameh stopped partying, smoking and began training for the _.
Output:
Explorers Grand Slam