Question: The ship "fram" was part of an expedition led by which Norwegian explorer ?
Context: Kon-Tiki is a Norwegian-Swedish documentary film about the Kon-Tiki expedition led by Norwegian explorer and writer Thor Heyerdahl in 1947, released in Sweden, Norway, Finland, and Denmark in 1950, followed by the United States in 1951.  The movie, which was directed by Thor Heyerdahl and edited by Olle Nordemar, received the Academy Award for Best Documentary Feature for 1951 at the 24th Academy Awards.  The Oscar officially went to Olle Nordemar.  It is currently the only feature film from Norway to have won an Academy Award. Roald Engelbregt Gravning Amundsen (] ; 16 July 1872 – c. 18 June 1928) was a Norwegian explorer of polar regions.  As the leader of the Antarctic expedition of 1910–12, which was the first to reach the South Pole, on 14 December 1911, he was a key expedition leader during the Heroic Age of Antarctic Exploration.  In 1926, he was the first expedition leader for the air expedition to the North Pole, making him the first person, without dispute, to reach both poles.  He is also known as having the first expedition to traverse the Northwest Passage (1903–06) in the Arctic. Fram (Norwegian for "Forward") is a 2008 play by Tony Harrison.  It uses the story of the Norwegian explorer Fridtjof Nansen's attempt to reach the North Pole, and his subsequent campaign to relieve famine in the Soviet Union to explore the role of art in a world beset by seemingly greater issues.  It is named after "Fram", the ship built for Nansen for his Arctic journey, and subsequently used by Roald Amundsen to reach the South Pole. Nansen's "Fram" expedition was an 1893–1896 attempt by the Norwegian explorer Fridtjof Nansen to reach the geographical North Pole by harnessing the natural east–west current of the Arctic Ocean.  In the face of much discouragement from other polar explorers, Nansen took his ship "Fram" to the New Siberian Islands in the eastern Arctic Ocean, froze her into the pack ice, and waited for the drift to carry her towards the pole.  Impatient with the slow speed and erratic character of the drift, after 18 months Nansen and a chosen companion, Hjalmar Johansen, left the ship with a team of dogs and sledges and made for the pole.  They did not reach it, but they achieved a record Farthest North latitude of 86°13.6′N before a long retreat over ice and water to reach safety in Franz Josef Land.  Meanwhile, "Fram" continued to drift westward, finally emerging in the North Atlantic Ocean. Fram ("Forward") is a ship that was used in expeditions of the Arctic and Antarctic regions by the Norwegian explorers Fridtjof Nansen, Otto Sverdrup, Oscar Wisting, and Roald Amundsen between 1893 and 1912.  It was designed and built by the Scottish-Norwegian shipwright Colin Archer for Fridtjof Nansen's 1893 Arctic expedition in which the plan was to freeze "Fram" into the Arctic ice sheet and float with it over the North Pole. The Fram Islands are a small group of rocky islands and rocks in the western portion of the Geologie Archipelago, 2 nmi north-northwest of Cape Geodesie.  They were photographed from the air by U.S. Navy Operation Highjump, 1946–47, charted by the French Antarctic Expedition, 1949–51, and named by them for the Norwegian polar ship "Fram", used by Fridtjof Nansen in the Arctic and Roald Amundsen in the Antarctic. The first expedition to reach the geographic South Pole was led by the Norwegian explorer Roald Amundsen.  He and four others arrived at the pole on 14 December 1911, five weeks ahead of a British party led by Robert Falcon Scott as part of the Terra Nova Expedition.  Amundsen and his team returned safely to their base, and later learned that Scott and his four companions had died on their return journey. Mount Kristensen ( ) is a mountain, 3,460 m high, standing on the west side of Nilsen Plateau 2 nmi southeast of Lindstrom Peak, in the Queen Maud Mountains of Antarctica.  It was named by the Advisory Committee on Antarctic Names in 1967 for H. Kristensen, an engineer on the ship "Fram" of Amundsen's South Pole expedition of 1910–12.  This naming preserves Amundsen's commemoration of "Mount H. Kristensen," a name applied in 1911 for an unidentifiable mountain in the general area. The Shackleton–Rowett Expedition, 1921–22, was the last Antarctic expedition led by Sir Ernest Shackleton.  Proposed as an ambitious two-year programme of Antarctic exploration it was curtailed by the death of Shackleton and the inadequacies of the expedition's ship, "Quest".  Under the command of Frank Wild several attempts were made to break through the Antarctic pack ice, but the expedition was never able to proceed further than longitude 20°E. On the crew's return to Cape Town to refit in preparation for the second term they were ordered home.  The crew of the "Quest" comprised 24 members in all, but only 19 were on board for the start of the Antarctic portion (Hussey accompanied Shackleton's body when it was put on board a ship for England, and Eriksen, Mooney and Bee-Mason had left before the ship reached South Georgia).  Gerald Lysaght, a yachtsman, accompanied the crew from Plymouth to Cape Verde. The Norwegian Geographical Society (in Norwegian: Det norske geografiske Selskab) is a Norwegian learned society founded in 1889.  Among the initiators was geologist Hans Henrik Reusch, who chaired the society from 1898 to 1903, and again from 1907 to 1909, and was also an honorary member.  In a speech at the society in January 1890 polar researcher Fridtjof Nansen proposed the Fram expedition, an attempt to reach the North Pole, and the building of the polar ship Fram.
Answer: Roald Amundsen