Question: Who was part of the ninth British expedition to Mount Everest and on May 29th,1953 became one of the first climbers to have reached the summit of Mount Everest with Namgyal Wamgdi?

full_context: Document 1: Tenzing Norgay: Tenzing Norgay OSN GM ( ; Sherpa: བསྟན་འཛིན་ནོར་རྒྱས "tendzin norgyé"; 29 May 1914 – 9 May 1986), born Namgyal Wangdi and often referred to as Sherpa Tenzing, was an Indian and Nepali Sherpa mountaineer. He was one of the first two individuals known to reach the summit of Mount Everest, which he accomplished with Edmund Hillary on 29 May 1953. "Time" named him one of the people of the 20th century.
Document 2: Mount Everest in 2017: The Mount Everest climbing season of 2017 began in spring, and the first climbers reached the top on May 11, from the north side. The first team on the south side was the Ghurka Everest Expedition, and 14 in that party reached the summit on May 15. By May 25, 300-400 people had summited Mount Everest from the Nepal side, and another 120 or so from the Chinese Tibet side. By early June, reports from Nepal indicated that 445 people had made it to the summit from the Nepali side. Reports indicate 160-200 summits on the north side, with 600-660 summiters overall for early 2017. This year had a roughly 50% success rate on that side for visiting climbers, which was down from other years.
Document 3: Erwin Emata: Erwin "Pastor" Emata (born 1973 in Davao City) is a mountain climber. Based on The Himalayan Database  published by American Alpine Club , Erwin is the third Filipino to reach the peak of Mount Everest, the highest mountain in the world. Like Leo Oracion, the second Filipino to reach Mount Everest's summit, he is a member of the First Philippine Mount Everest Expedition (FPMEE). The Himalayan DataBase published by American Alpine Club had included Leo in the list of Everest South summitteers for 2006 on May 17, officially recognizing him as the 2nd Filipino on top Mount Everest.
Document 4: Chhewang Nima: Chhewang Nima (Nepali: छेवाङ निमा ) ( 1967 – 23 October 2010) was a well known Nepalese Sherpa who had climbed Mount Everest 19 times at the time of his loss on Baruntse. He was also called Chuwang Nima, and Chuwang Nima Sherpa. His loss in the avalanche and subsequent search made international news, and he was a well known mountaineer in the United States as well as Nepal. He worked as a professional mountaineer, but at the time of his loss he was helping another team fix lines after they had asked for help.
Document 5: Edmund Hillary: Sir Edmund Percival "Ed" Hillary {'1': ", '2': ", '3': ", '4': "} (20 July 1919 – 11 January 2008) was a New Zealand mountaineer, explorer, and philanthropist. On 29 May 1953, Hillary and Nepalese Sherpa mountaineer Tenzing Norgay became the first climbers confirmed to have reached the summit of Mount Everest. They were part of the ninth British expedition to Everest, led by John Hunt. "TIME magazine" named Hillary one of the people of the 20th century.
Document 6: Apa Sherpa: Apa (born Lhakpa Tenzing Sherpa; 20 January 1960), nicknamed "Super Sherpa", is a Nepalese Sherpa mountaineer who, jointly with Phurba Tashi, holds the record for reaching the summit of Mount Everest more times than any other person. As part of The Eco Everest Expedition 2011, Apa made his 21st Mount Everest summit in May 2011 then retired after a promise to his wife to stop climbing after 21 ascents. He first summited Everest in 1990 and his last time to the summit was in 2011. Apa met Edmund Hillary many times, and was on the Expedition with his son Peter Hillary in 1990, which was the first summit for both of them. Apa estimates he has been through the Khumbu Icefall about 1000 times and almost went with Rob Hall's ill-fated 1996 expedition. He had this to say when questioned about stopping at 21, "Everyone says 21 is a good number. I have to make my family happy. Every time I go, they worry because Everest is very risky... ."
Document 7: Hillary Montes: The Hillary Montes (less officially, Hillary Mountains) are mountains that reach 1.6 km above the surface of the dwarf planet Pluto. They are located northwest of Norgay Montes in the southwest border area of Sputnik Planitia in the south of Tombaugh Regio (or the part of Tombaugh Regio south of the equator). The Hillary Montes were first viewed by the "New Horizons" spacecraft on 14 July 2015, and announced by NASA on 24 July 2015. The mountains are named after Sir Edmund Hillary, New Zealand mountaineer, who, along with Nepalese Sherpa mountaineer, Tenzing Norgay, were the first climbers to reach the summit of the highest peak on Earth, Mount Everest, on 29 May 1953. On 7 September 2017, the name "Hillary Montes" was officially approved together with the names of Tombaugh Regio and twelve other nearby surface features.
Document 8: Mount Everest reconnaissance from Nepal: After World War II, with Tibet closing its borders and Nepal becoming considerably more open, Mount Everest reconnaissance from Nepal became possible for the first time culminating in the successful ascent of 1953. In 1950 there was a highly informal trek to what was to become Everest Base Camp and photographs were taken of a possible route ahead. Next year the 1951 British Mount Everest reconnaissance expedition reconnoitred various possible routes to Mount Everest from the south and the only one they considered feasible was the one via the Khumbu Icefall, Western Cwm and South Col. In 1952, while the Swiss were making an attempt on the summit that nearly succeeded, the British practised their high-altitude Himalayan technique by attempting Cho Oyu, nearby to the west.
Document 9: Britton Keeshan: Britton Keeshan MD, MPH (born December 1, 1981) is one of the youngest people to climb the tallest mountains on all seven continents in a feat known as the Seven Summits. He accomplished this feat on May 24, 2004, when he successfully summited Mount Everest at the age of 22 years and 179 days old. Keeshan held the record until June 2005 and is now listed as fourth on the list.
Document 10: Joint Himalayan Committee: The Mount Everest Committee was a body formed by the Alpine Club and the Royal Geographical Society to co-ordinate and finance the 1921 British Mount Everest reconnaissance expedition to Mount Everest and all subsequent British expeditions to climb the mountain until 1947. It was then renamed the Joint Himalayan Committee; this latter committee organized and financed the successful first ascent of Mount Everest in 1953.
Document 11: Tenzing Sonam: Tenzing Sonam (born 16 January 1959) is a Tibetan film director, writer and essayist. He works through his production company, White Crane Films, which he runs with his partner, Ritu Sarin.
Document 12: Peter Hillary: Peter Edmund Hillary (born 26 December 1954) is a New Zealand mountaineer, philanthropist and writer. He is the son of adventurer Sir Edmund Hillary, who, along with Nepalese Sherpa mountain climber Tenzing Norgay, completed the first successful ascent of Mount Everest. When Peter Hillary summited Everest in 1990, he and his father were the first father/son duo to achieve the feat. Hillary has achieved two summits of Everest, an 84-day trek across Antarctica to the South Pole, and an expedition guiding astronaut Neil Armstrong to land a small aircraft at the North Pole. He has climbed many of the world's major peaks, and on 19 June 2008, completed the Seven Summits, reaching the top of the highest mountains on all seven continents, when he summited Denali in Alaska.
Document 13: Hillary Shield: The trophy is named in memory of the New Zealand mountaineer and explorer, Sir Edmund Hillary. The shield was announced on 23 October 2008 by Jock Hobbs, the Chairman of the New Zealand Rugby Union. It was made by silversmiths Thomas Lyte.
Document 14: 1924 British Mount Everest expedition: The 1924 British Mount Everest expedition was—after the 1922 British Mount Everest expedition—the second expedition with the goal of achieving the first ascent of Mount Everest. After two summit attempts in which Edward Norton set a world altitude record of 28,126 feet (8572m), the mountaineers George Mallory and Andrew "Sandy" Irvine disappeared on the third attempt. Their disappearance has given rise to the long-standing unanswered question of whether or not the pair climbed to the summit. Mallory's body was found in 1999 at 26,760 feet (8155 m), but the resulting clues did not provide conclusive evidence as to whether the summit was reached.
Document 15: Douglas Douglas-Hamilton, 14th Duke of Hamilton: Air Commodore Douglas Douglas-Hamilton, 14th Duke of Hamilton and 11th Duke of Brandon (3 February 1903 – 30 March 1973) was a Scottish nobleman and pioneering aviator who, together with D.F. McIntyre, was the first man to fly over Mount Everest.
ground_truth: Edmund Hillary