paragraph_text: Africa is the world's second largest and second most - populous continent (behind Asia in both categories). At about 30.3 million km (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area and 20% of its land area. With 1.2 billion people as of 2016, it accounts for about 16% of the world's human population. The continent is surrounded by the Mediterranean Sea to the north, the Isthmus of Suez and the Red Sea to the northeast, the Indian Ocean to the southeast and the Atlantic Ocean to the west. The continent includes Madagascar and various archipelagos. It contains 54 fully recognised sovereign states (countries), nine territories and two de facto independent states with limited or no recognition. The majority of the continent and its countries are in the Northern Hemisphere, with a substantial portion and number of countries in the Southern Hemisphere.

paragraph_text: The Güferhorn is a mountain in the Lepontine Alps, located between the valleys of Vals and Hinterrhein in Graubünden. At 3,379 metres above sea level it is the highest summit of the Lepontine Alps lying east of the Rheinwaldhorn. The northern side of the massif is covered by the Güfergletscher, a 2 kilometres long glacier. It lies above 2,600 metres on the east side of a ridge starting at the summit of the Güferhorn and separating the valleys of Länta and Canaltal, both converging at the Zervreilasee, south of Vals.

paragraph_text: Serre Chevalier is a major ski resort in southeastern France, in the Hautes-Alpes department of the Alps. Near the Parc National des Ecrins, it enjoys a large skiing area, with of slopes and favourable weather, boasting 300 days of sunshine a year. In Serre Chevalier, of the slopes are covered by snow cannons to supplement natural snowfall. It is owned by Compagnie des Alpes.

paragraph_text: Mummel River, a watercourse of the Manning River catchment, is located in the Northern Tablelands and Mid North Coast districts of New South Wales, Australia.

paragraph_text: The Alps cover 65% of Switzerland's total 41,285 square kilometres (15,940 sq mi) surface area, making it one of the most alpine countries. Despite the fact that Switzerland covers only 14% of the Alps total 192,753 square kilometres (74,422 sq mi) area, 48 out of 82 alpine four - thousanders are located in the Swiss Alps and practically all of the remaining 34 are within 20 kilometres (12 mi) of the country's border.

paragraph_text: The Battle of the Tanais River in 373 AD between the Huns and the Alans, was fought on the traditional border between Asia and Europe. The Huns were victorious.

paragraph_text: An Antarctic oasis is a large area naturally free of snow and ice in the otherwise ice-covered continent of Antarctica.

paragraph_text: The Stellihorn is a mountain of the Swiss Pennine Alps, overlooking the lake of Mattmark in the canton of Valais. It lies south of Saas-Almagell in the upper valley of Saas. The north side is covered by a glacier named "Nollen Gletscher".

paragraph_text: Mehi River, a watercourse that is part of the Barwon catchment within the Murray–Darling basin, is located in the Orana district of New South Wales, Australia.

paragraph_text: Wallingat River, a watercourse of the Mid-Coast Council system, is located in the Mid North Coast district of New South Wales, Australia.

paragraph_text: Mount Queequeg () is a conspicuous, partly snow-covered mountain with three conical summits, the highest 900 m, situated in eastern Aristotle Mountains between the mouths of Starbuck and Stubb Glaciers on the east coast of Graham Land in Antarctica.

paragraph_text: The Port of Brookings Harbor is the port authority for the city of Brookings, Oregon, United States, and serving the neighboring community of Harbor. The district covers from the mouth of the Chetco River south to the Oregon-California border, north to the mouth of the Pistol River, and east to the Curry-Josephine county line. The district is governed by a five-member commission elected at-large from the district population of approximately 16,000.

paragraph_text: Peaks in France, Italy and Switzerland lie in the "Houillière zone", which consists of basement with sediments from the Mesozoic Era. High "massifs" with external sedimentary cover are more common in the Western Alps and were affected by Neogene Period thin-skinned thrusting whereas the Eastern Alps have comparatively few high peaked massifs. Similarly the peaks in Switzerland extending to western Austria (Helvetic nappes) consist of thin-skinned sedimentary folding that detached from former basement rock.

paragraph_text: Maria River, a watercourse of the Hastings River catchment, is located in the Mid North Coast region of New South Wales, Australia.

paragraph_text: Today both the Papireto river and the Kemonia are covered up by buildings. However, the shape of the former watercourses can still be recognised today, because the streets that were built on them follow their shapes. Today the only waterway not drained yet is the Oreto river that divides the downtown of the city from the western uptown and the industrial districts. In the basins there were, though, many seasonal torrents that helped formed swampy plains, reclaimed during history; a good example of which can be found in the borough of Mondello.

paragraph_text: The Alps provide lowland Europe with drinking water, irrigation, and hydroelectric power. Although the area is only about 11 percent of the surface area of Europe, the Alps provide up to 90 percent of water to lowland Europe, particularly to arid areas and during the summer months. Cities such as Milan depend on 80 percent of water from Alpine runoff. Water from the rivers is used in over 500 hydroelectricity power plants, generating as much as 2900 kilowatts of electricity.

paragraph_text: "Bass to Mouth" is the tenth episode of the fifteenth season of the American animated television series "South Park", and the 219th episode overall. It first aired on Comedy Central in the United States on October 19, 2011. Much of the episode's plot alludes to WikiLeaks and its surrounding controversy.

paragraph_text: The Journal of Modern History is a quarterly peer-reviewed academic journal covering European intellectual, political, and cultural history, published by the University of Chicago Press. Established in 1929, the journal covers events from approximately 1500 to the present, with a geographical scope extending from the United Kingdom through the European continent, including Russia and the Balkans.

paragraph_text: The river has its sources in the eastern part of Belgorod Oblast, on the southeastern slopes of the Central Russian Upland. It flows in a northeasterly direction, and joins the Don some west of the town of Liski in Voronezh Oblast.

paragraph_text: Lake Vida is a hypersaline lake in Victoria Valley, the northernmost of the large McMurdo Dry Valleys, on the continent of Antarctica. It is isolated under year-round ice cover, and is considerably more saline than seawater. It came to public attention in 2002 when microbes frozen in its ice cover for more than 2,800 years were successfully thawed and reanimated.

Question: How much of the continent having the mouth of the watercourse of Tikhaya Sosna does the Alps cover?
Answer: 11 percent of the surface area