1921 British Mount Everest reconnaissance expedition

Target entity: 1921 British Mount Everest reconnaissance expedition
Context triple: [George Leigh-Mallory, memberOf, 1921 British Mount Everest reconnaissance expedition]

• A. 1953 British Mount Everest expedition
  The 1953 British Mount Everest expedition was the historic climbing campaign that achieved the first confirmed ascent of Mount Everest, led by John Hunt and culminating in Edmund Hillary and Tenzing Norgay reaching the summit.
• B. 1955 British Kangchenjunga expedition
  The 1955 British Kangchenjunga expedition was the mountaineering team that achieved the first successful ascent of Kangchenjunga, the world’s third-highest mountain.
• C. British Combined Services Expedition
  The British Combined Services Expedition was a military-led mountaineering team from the United Kingdom known for pioneering high-altitude ascents in remote regions.
• D. Commonwealth Trans-Antarctic Expedition
  The Commonwealth Trans-Antarctic Expedition was a 1955–1958 British-led mission that achieved the first overland crossing of Antarctica via the South Pole.
• E. American Antarctic Mountaineering Expedition 1966–1967
  The American Antarctic Mountaineering Expedition 1966–1967 was a pioneering U.S. climbing team that achieved the first ascent of Antarctica’s highest peak, Vinson Massif, helping to open the continent to modern mountaineering.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: 1921 British Mount Everest reconnaissance expedition
Target entity description: The 1921 British Mount Everest reconnaissance expedition was the first official British mission to explore and map routes on Mount Everest, laying the groundwork for later summit attempts.

• A. 1953 British Mount Everest expedition
  The 1953 British Mount Everest expedition was the historic climbing campaign that achieved the first confirmed ascent of Mount Everest, led by John Hunt and culminating in Edmund Hillary and Tenzing Norgay reaching the summit.
• B. 1955 British Kangchenjunga expedition
  The 1955 British Kangchenjunga expedition was the mountaineering team that achieved the first successful ascent of Kangchenjunga, the world’s third-highest mountain.
• C. British Combined Services Expedition
  The British Combined Services Expedition was a military-led mountaineering team from the United Kingdom known for pioneering high-altitude ascents in remote regions.
• D. Commonwealth Trans-Antarctic Expedition
  The Commonwealth Trans-Antarctic Expedition was a 1955–1958 British-led mission that achieved the first overland crossing of Antarctica via the South Pole.
• E. American Antarctic Mountaineering Expedition 1966–1967
  The American Antarctic Mountaineering Expedition 1966–1967 was a pioneering U.S. climbing team that achieved the first ascent of Antarctica’s highest peak, Vinson Massif, helping to open the continent to modern mountaineering.
• F. None of above. chosen