Question: How many feet tall is the place where Green Boots died?

full_context: Document 1: Mount Everest: In 1865, Everest was given its official English name by the Royal Geographical Society, upon a recommendation by Andrew Waugh, the British Surveyor General of India. As there appeared to be several different local names, Waugh chose to name the mountain after his predecessor in the post, Sir George Everest, despite George Everest's objections.
Document 2: Mount Everest in 2017: The Mount Everest climbing season of 2017 began in spring with the first climbers reaching the top on May 11, from the north side. The first team on the south side reached the top on May 15. 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. By 2018, the figure for the number of summiters of Everest was refined to 648. This includes 449 which summited via Nepal (from the South) and 120 from Chinese Tibet (North side).
Document 3: Ötzi: BULLET::::- Magdalena Mohar Jarc, a retired Slovenian climber, who alleged that she discovered the corpse first after falling into a crevice, and shortly after returning to a mountain hut, asked Helmut Simon to take photographs of Ötzi. She cited Reinhold Messner, who was also present in the mountain hut, as the witness to this.
Document 4: Yangtze: The river originates from several tributaries in the eastern part of the Tibetan Plateau, two of which are commonly referred to as the ``source ''. Traditionally, the Chinese government has recognized the source as the Tuotuo tributary at the base of a glacier lying on the west of Geladandong Mountain in the Tanggula Mountains. This source is found at 33 ° 25 ′ 44'' N 91 ° 10 ′ 57 ''E ﻿ / ﻿ 33.42889 ° N 91.18250 ° E ﻿ / 33.42889; 91.18250 and while not the furthest source of the Yangtze, it is the highest source at 5,342 m (17,526 ft) above sea level. The true source of the Yangtze, hydrologically the longest river distance from the sea, is at Jari Hill at the head of the Dam Qu tributary, approximately 325 km (202 mi) southeast of Geladandong. This source was only discovered in the late 20th century and lies in wetlands at 32 ° 36 ′ 14'' N 94 ° 30 ′ 44 ''E ﻿ / ﻿ 32.60389 ° N 94.51222 ° E ﻿ / 32.60389; 94.51222 and 5,170 m (16,960 ft) above sea level just southeast of Chadan Township in Zadoi County, Yushu Prefecture, Qinghai. As the historical spiritual source of the Yangtze, the Geladandong source is still commonly referred to as the source of the Yangtze since the discovery of the Jari Hill source.
Document 5: Earth Day 20 International Peace Climb: The Earth Day 20 International Peace Climb was an expedition to reach the summit of Mount Everest during Earth Week 1990 led by Jim Whittaker, the first American to climb Mount Everest (in 1963), and marked the first time in history that mountaineers from the United States, Soviet Union and China had roped together to climb a mountain, let alone Mount Everest.
Document 6: Santosh Yadav: Santosh Yadav is an Indian mountaineer. She is the first woman in the world to climb Mount Everest twice, and the first woman to successfully climb Mt. Everest from Kangshung Face. She climbed the peak first in May 1992 and then again in May 1993.
Document 7: Mount Everest: Mount Everest, known in Nepali as Sagarmatha (सगरमाथा) and in Tibetan as Chomolungma (ཇོ ་ མོ ་ གླང ་ མ), is Earth's highest mountain above sea level, located in the Mahalangur Himal sub-range of the Himalayas. The international border between Nepal (Province No. 1) and China (Tibet Autonomous Region) runs across its summit point.
Document 8: Nepal: Nepal (, ISO:), officially Federal Democratic Republic of Nepal, is a landlocked country in South Asia. It is located mainly in the Himalayas, but also includes parts of the Indo-Gangetic Plain. With an estimated population of 26.4 million, it is 48th largest country by population and 93rd largest country by area. It borders China in the north and India in the south, east and west while Bangladesh is located within only 27 km (17 mi) of its southeastern tip and Bhutan is separated from it by the Indian state of Sikkim. Nepal has a diverse geography, including fertile plains, subalpine forested hills, and eight of the world's ten tallest mountains, including Mount Everest, the highest point on Earth. Kathmandu is the capital and the largest city. Nepal is a multiethnic country with Nepali as the official language.
Document 9: Tibet: Tibet (i/tᵻˈbɛt/; Wylie: Bod, pronounced [pʰø̀ʔ]; Chinese: 西藏; pinyin: Xīzàng) is a region on the Tibetan Plateau in Asia. It is the traditional homeland of the Tibetan people as well as some other ethnic groups such as Monpa, Qiang and Lhoba peoples and is now also inhabited by considerable numbers of Han Chinese and Hui people. Tibet is the highest region on Earth, with an average elevation of 4,900 metres (16,000 ft). The highest elevation in Tibet is Mount Everest, earth's highest mountain rising 8,848 m (29,029 ft) above sea level.
Document 10: Nepal: Nepal (/ nəˈpɔːl / (listen); Nepali: नेपाल Nepāl (neˈpal)), officially the Federal Democratic Republic of Nepal (Nepali: सङ्घीय लोकतान्त्रिक गणतन्त्र नेपाल Sanghiya Loktāntrik Ganatantra Nepāl), is a landlocked country in South Asia located mainly in the Himalayas but also includes parts of the Indo - Gangetic Plain. With an estimated population of 26.4 million, it is 48th largest country by population and 93rd largest country by area. It borders China in the north and India in the south, east, and west while Bangladesh is located within only 27 km (17 mi) of its southeastern tip and Bhutan is separated from it by the Indian state of Sikkim. A Himalayan state, Nepal has a diverse geography, including fertile plains, subalpine forested hills, and eight of the world's ten tallest mountains, including Mount Everest, the highest point on Earth. Kathmandu is the nation's capital and largest city. Nepal is a multiethnic nation with Nepali as the official language.
Document 11: Green Boots: Green Boots is the name given to the unidentified corpse of a climber that became a landmark on the main Northeast ridge route of Mount Everest. Though his identity has not been officially confirmed, he is believed to be Tsewang Paljor, an Indian climber who died on Mount Everest in 1996. The term "Green Boots" originated from the green Koflach mountaineering boots that are on the feet of the corpse. All expeditions from the north side encountered the body curled in the limestone alcove cave at . In 2006, a different climber, David Sharp, died during a solo climb in what is known as "Green Boots' Cave".
Document 12: Tibet: Tibet has some of the world's tallest mountains, with several of them making the top ten list. Mount Everest, located on the border with Nepal, is, at 8,848 metres (29,029 ft), the highest mountain on earth. Several major rivers have their source in the Tibetan Plateau (mostly in present-day Qinghai Province). These include the Yangtze, Yellow River, Indus River, Mekong, Ganges, Salween and the Yarlung Tsangpo River (Brahmaputra River). The Yarlung Tsangpo Grand Canyon, along the Yarlung Tsangpo River, is among the deepest and longest canyons in the world.
Document 13: Lobsang Tshering: Lopsang Tshering Bhutia () (1951/1952–10 May 1993) was a Nepali Sherpa mountaineer who died on Mount Everest and the nephew of Tenzing Norgay. His death made international headlines because he had died on the 40th anniversary expedition of his uncle's summiting. His uncle, Tenzing Norgay, had died at home of natural causes in 1986 at the age of 72. Tenzing Norgay was the first person to summit Mount Everest in 1953 along with Sir Edmund Hillary.
Document 14: Brahmaputra River: The Brahmaputra (/ ˌbrɑːməˈpuːtrə / is one of the major rivers of Asia, a trans - boundary river which flows through China, India and Bangladesh. As such, it is known by various names in the region: Assamese: ব্ৰহ্মপুত্ৰ নদ ('নদ' nôd, masculine form of 'নদী' nôdi ``river '') Brôhmôputrô (bɹɔɦmɔputɹɔ); Sanskrit: ब्रह्मपुत्र, IAST: Brahmaputra; Tibetan: ཡར ་ ཀླུངས ་ གཙང ་ པོ ་, Wylie: yar klung gtsang po Yarlung Tsangpo; simplified Chinese: 布拉马普特拉河; traditional Chinese: 布拉馬普特拉河; pinyin: Bùlāmǎpǔtèlā Hé. It is also called Tsangpo - Brahmaputra (when referring to the whole river including the stretch within Tibet). The Manas River, which runs through Bhutan, joins it at Jogighopa, in India. It is the ninth largest river in the world by discharge, and the 15th longest.
Document 15: Tibet: The Indus and Brahmaputra rivers originate from a lake (Tib: Tso Mapham) in Western Tibet, near Mount Kailash. The mountain is a holy pilgrimage site for both Hindus and Tibetans. The Hindus consider the mountain to be the abode of Lord Shiva. The Tibetan name for Mt. Kailash is Khang Rinpoche. Tibet has numerous high-altitude lakes referred to in Tibetan as tso or co. These include Qinghai Lake, Lake Manasarovar, Namtso, Pangong Tso, Yamdrok Lake, Siling Co, Lhamo La-tso, Lumajangdong Co, Lake Puma Yumco, Lake Paiku, Lake Rakshastal, Dagze Co and Dong Co. The Qinghai Lake (Koko Nor) is the largest lake in the People's Republic of China.
ground_truth: 29,029
sub_queries: Green Boots >> place of death Answer: Mount Everest
How tall, in feet, is Mount Everest ? Answer: 29,029