Question: What is the square mileage of the continent that houses Mount Morton?

full_context: Document 1: Mount Gray: Mount Gray () is a rounded, ice-worn mountain on the southwest part of the McDonald Heights in coastal Marie Byrd Land, Antarctica. It stands on the east side of Hull Glacier, north of Oehlenschlager Bluff. The mountain was discovered on aerial flights from the West Base of the United States Antarctic Service in 1940, and named for Orville Gray, an aviation machinist's mate, and plane captain on these flights.
Document 2: Gratton Nunatak: Gratton Nunatak () is a bare, linear nunatak lying at the south side of the mouth of McCarthy Glacier, Antarctica, where the latter enters Reedy Glacier. It was mapped by the United States Geological Survey from surveys and U.S. Navy air photos, 1960–64, and was named by the Advisory Committee on Antarctic Names for John W. Gratton, a construction mechanic at Byrd Station in 1962.
Document 3: Wilkes Land: Wilkes Land is a large district of land in eastern Antarctica, formally claimed by Australia as part of the Australian Antarctic Territory, though the validity of this claim has been placed for the period of the operation of the Antarctic Treaty, to which Australia is a signatory. It fronts on the southern Indian Ocean between Queen Mary Coast and Adelie Land, extending from Cape Hordern in 100°31' E to Pourquoi Pas Point, in 136°11' E. The region extends as a sector about 2600 km towards the South Pole, with an estimated land area of 2,600,000 km², mostly glaciated. It is further subdivided in the following coastal areas which can also be thought of as sectors extending to the South Pole:
Document 4: Blériot Glacier: Blériot Glacier () is a short, but wide, glacier lying east of Salvesen Cove and Zimzelen Glacier and southwest of Cayley Glacier on Danco Coast, Graham Land in Antarctica. Photographed by the Falkland Islands and Dependencies Aerial Survey Expedition in 1956–57, and mapped from these photos by the Falkland Islands Dependencies Survey, it was named by the UK Antarctic Place-Names Committee in 1960 for Louis Blériot (1872–1936), a French aviator who in 1907 flew the first full-size powered monoplane, and who made the first flight across the English Channel in July 1909.
Document 5: Antarctica: Antarctica is colder than the Arctic for three reasons. First, much of the continent is more than 3,000 m (9,800 ft) above sea level, and temperature decreases with elevation in the troposphere. Second, the Arctic Ocean covers the north polar zone: the ocean's relative warmth is transferred through the icepack and prevents temperatures in the Arctic regions from reaching the extremes typical of the land surface of Antarctica. Third, the Earth is at aphelion in July (i.e., the Earth is farthest from the Sun in the Antarctic winter), and the Earth is at perihelion in January (i.e., the Earth is closest to the Sun in the Antarctic summer). The orbital distance contributes to a colder Antarctic winter (and a warmer Antarctic summer) but the first two effects have more impact.
Document 6: Antarctica: Due to its location at the South Pole, Antarctica receives relatively little solar radiation. This means that it is a very cold continent where water is mostly in the form of ice. Precipitation is low (most of Antarctica is a desert) and almost always in the form of snow, which accumulates and forms a giant ice sheet which covers the land. Parts of this ice sheet form moving glaciers known as ice streams, which flow towards the edges of the continent. Next to the continental shore are many ice shelves. These are floating extensions of outflowing glaciers from the continental ice mass. Offshore, temperatures are also low enough that ice is formed from seawater through most of the year. It is important to understand the various types of Antarctic ice to understand possible effects on sea levels and the implications of global cooling.
Document 7: Rennick Glacier: Rennick Glacier is broad glacier, nearly long, which is one of the largest in Antarctica. It rises on the polar plateau westward of Mesa Range and is wide, narrowing to near the coast. It takes its name from Rennick Bay where the glacier reaches the sea. The seaward part of the glacier was photographed by U.S. Navy (USN) Operation Highjump, 1946-47. The upper reaches of the Rennick Glacier were discovered and explored by the U.S. Victoria Land Traverse (VLT) in February 1960, and the first ascent made of Welcome Mountain by John Weihaupt, Alfred Stuart, Claude Lorius and Arnold Heine of the VLT party. On February 10, 1960, Lieutenant Commander Robert L. Dale, pilot of U.S. Navy (USN) Squadron VX-6, evacuated the VLT from 7238S, 16132E, on this glacier, and then conducted an aerial photographic reconnaissance to Rennick Bay on the coast before returning the VLT team to McMurdo Station.
Document 8: Grove Mountains: The Grove Mountains are a large, scattered group of mountains and nunataks extending over an area of approximately , located east of the Mawson Escarpment in American Highland, Antarctica. They were first photographed from the air by aircraft of U.S. Navy Operation Highjump, 1946–47, and named by the Antarctic Names Committee of Australia for Squadron Leader I.L. Grove, a Royal Australian Air Force pilot with the Australian National Antarctic Research Expeditions, who made a November 1958 landing in these mountains.
Document 9: Moran Glacier: Moran Glacier () is a glacier 10 nautical miles (18 km) long, joined at the south side by Walter Glacier, flowing east into Schokalsky Bay, situated in the northeast portion of Alexander Island, Antarctica. Photographed from the air by Ronne Antarctic Research Expedition (RARE), 1947–48, and surveyed by Falkland Islands Dependencies Survey (FIDS), 1948-50. Named by Advisory Committee on Antarctic Names (US-ACAN) for Commander Clifford D. Moran, U.S. Navy, aircraft pilot, Squadron VXE-6, U.S. Navy Operation Deep Freeze, 1966 and 1977.
Document 10: Antarctica: Antarctica (US English i/æntˈɑːrktɪkə/, UK English /ænˈtɑːktɪkə/ or /ænˈtɑːtɪkə/ or /ænˈɑːtɪkə/)[Note 1] is Earth's southernmost continent, containing the geographic South Pole. It is situated in the Antarctic region of the Southern Hemisphere, almost entirely south of the Antarctic Circle, and is surrounded by the Southern Ocean. At 14,000,000 square kilometres (5,400,000 square miles), it is the fifth-largest continent in area after Asia, Africa, North America, and South America. For comparison, Antarctica is nearly twice the size of Australia. About 98% of Antarctica is covered by ice that averages 1.9 km (1.2 mi; 6,200 ft) in thickness, which extends to all but the northernmost reaches of the Antarctic Peninsula.
Document 11: Antarctica: Positioned asymmetrically around the South Pole and largely south of the Antarctic Circle, Antarctica is the southernmost continent and is surrounded by the Southern Ocean; alternatively, it may be considered to be surrounded by the southern Pacific, Atlantic, and Indian Oceans, or by the southern waters of the World Ocean. It covers more than 14,000,000 km2 (5,400,000 sq mi), making it the fifth-largest continent, about 1.3 times as large as Europe. The coastline measures 17,968 km (11,165 mi) and is mostly characterized by ice formations, as the following table shows:
Document 12: Mount Morton: Mount Morton () is a mountain standing between Blériot Glacier and Cayley Glacier on the west coast of Graham Land, Antarctica. It was photographed by the Falkland Islands and Dependencies Aerial Survey Expedition in 1956–57, and mapped from these photos by the Falkland Islands Dependencies Survey. The mountain was named by the UK Antarctic Place-Names Committee in 1960 for Grant Morton, an American aviator who made the first parachute descent from an airplane using a parachute carried loosely.
Document 13: Gregory Glacier: Gregory Glacier () is a glacier flowing into Cierva Cove north of Breguet Glacier, on the west coast of Graham Land, Antarctica. It was shown on an Argentine government chart of 1957. The glacier was named by the UK Antarctic Place-Names Committee in 1960 for Hollingsworth Franklin Gregory, an American pioneer in the development and use of helicopters.
Document 14: Wilkes Land: Wilkes Land is a large district of land in eastern Antarctica, formally claimed by Australia as part of the Australian Antarctic Territory, though the validity of this claim has been placed for the period of the operation of the Antarctic Treaty, to which Australia is a signatory. It fronts on the southern Indian Ocean between Queen Mary Coast and Adelie Land, extending from Cape Hordern in 100°31' E to Pourquoi Pas Point, in 136°11' E. The region extends as a sector about 2600 km towards the South Pole, with an estimated land area of 2,600,000 km², mostly glaciated. It is further subdivided in the following coastal areas which can also be thought of as sectors extending to the South Pole:
Document 15: Antarctic Plate: The Antarctic Plate is a tectonic plate containing the continent of Antarctica, the Kerguelen Plateau and extending outward under the surrounding oceans. After breakup from Gondwana (the southern part of the supercontinent Pangea), the Antarctic plate began moving the continent of Antarctica south to its present isolated location causing the continent to develop a much colder climate. The Antarctic Plate is bounded almost entirely by extensional mid-ocean ridge systems. The adjoining plates are the Nazca Plate, the South American Plate, the African Plate, the Somali Plate, the Indo-Australian Plate, the Pacific Plate, and, across a transform boundary, the Scotia Plate.
ground_truth: 5,400,000
sub_queries: Mount Morton >> continent Answer: Antarctica
What is the size of Antarctica in square miles? Answer: 5,400,000