Question: What is the 2018 population of the host of the 1920 Summer Olympics involving the country that contains both Wengen, and the village that has the Monta Rosa Hotel?

full_context: Document 1: Alps: The lower regions and larger towns of the Alps are well-served by motorways and main roads, but higher mountain passes and byroads, which are amongst the highest in Europe, can be treacherous even in summer due to steep slopes. Many passes are closed in winter. A multitude of airports around the Alps (and some within), as well as long-distance rail links from all neighbouring countries, afford large numbers of travellers easy access from abroad.
Document 2: Flag of Belgium: The national flag of the kingdom of Belgium (Dutch: Vlag van het koninkrijk België, French: Drapeau de la Belgique, German: Flagge Belgiens) is a tricolour of three bands of black, yellow, and red. The colours were taken from the coat of arms of the Duchy of Brabant, and the vertical design may be based on the flag of France. When flown, the black band is nearest the pole (at the hoist side). It has the unusual proportions of 13: 15.
Document 3: Alps: During the post-World War I period ski-lifts were built in Swiss and Austrian towns to accommodate winter visitors, but summer tourism continued to be important; by the mid-20th century the popularity of downhill skiing increased greatly as it became more accessible and in the 1970s several new villages were built in France devoted almost exclusively to skiing, such as Les Menuires. Until this point Austria and Switzerland had been the traditional and more popular destinations for winter sports, but by the end of the 20th century and into the early 21st century, France, Italy and the Tyrol began to see increases in winter visitors. From 1980 to the present, ski-lifts have been modernized and snow-making machines installed at many resorts, leading to concerns regarding the loss of traditional Alpine culture and questions regarding sustainable development as the winter ski industry continues to develop quickly and the number of summer tourists decline.
Document 4: Belgium: Belgium, officially the Kingdom of Belgium, is a country in Western Europe bordered by France, the Netherlands, Germany and Luxembourg. A small and densely populated country, it covers an area of 30,528 square kilometres (11,787 sq mi) and has a population of more than 11 million. Straddling the cultural boundary between Germanic and Latin Europe, Belgium is home to two main linguistic groups: the Dutch - speaking, mostly Flemish community, which constitutes about 59 percent of the population, and the French - speaking, mostly Walloon population, which comprises about 40 percent of all Belgians. Additionally, there is a small group of German speakers, numbering around one percent, who live in the East Cantons. The capital and largest city is Brussels; other major cities are Antwerp, Ghent, Charleroi and Liège.
Document 5: Alps: Some high mountain villages, such as Avoriaz (in France), Wengen, and Zermatt (in Switzerland) are accessible only by cable car or cog-rail trains, and are car free. Other villages in the Alps are considering becoming car free zones or limiting the number of cars for reasons of sustainability of the fragile Alpine terrain.
Document 6: Eiger: The first ascent was made by the western flank on August 11, 1858 by Charles Barrington with guides Christian Almer and Peter Bohren. They started at 3: 00 a.m. from Wengen. Barrington describes the route much as it is followed today, staying close to the edge of the north face much of the way. They reached the summit at about noon, stayed for some 10 minutes and descended in about four hours. Barrington describes the reaching of the top, saying, ``the two guides kindly gave me the place of first man up. ''Their ascent was confirmed by observation of a flag left on the summit. According to Harrer's The White Spider, Barrington was originally planning to make the first ascent of the Matterhorn, but his finances did not allow him to travel there as he was already staying in the Eiger region.
Document 7: Belgium: Belgium was the first continental European country to undergo the Industrial Revolution, in the early 19th century. Liège and Charleroi rapidly developed mining and steelmaking, which flourished until the mid-20th century in the Sambre and Meuse valley and made Belgium among one of the three most industrialized nations in the world from 1830 to 1910. However, by the 1840s the textile industry of Flanders was in severe crisis, and the region experienced famine from 1846 to 1850.After World War II, Ghent and Antwerp experienced a rapid expansion of the chemical and petroleum industries. The 1973 and 1979 oil crises sent the economy into a recession; it was particularly prolonged in Wallonia, where the steel industry had become less competitive and experienced serious decline. In the 1980s and 1990s, the economic center of the country continued to shift northwards and is now concentrated in the populous Flemish Diamond area.By the end of the 1980s, Belgian macroeconomic policies had resulted in a cumulative government debt of about 120% of GDP. As of 2006, the budget was balanced and public debt was equal to 90.30% of GDP. In 2005 and 2006, real GDP growth rates of 1.5% and 3.0%, respectively, were slightly above the average for the Euro area. Unemployment rates of 8.4% in 2005 and 8.2% in 2006 were close to the area average. By October 2010, this had grown to 8.5% compared to an average rate of 9.6% for the European Union as a whole (EU 27). From 1832 until 2002, Belgium's currency was the Belgian franc. Belgium switched to the euro in 2002, with the first sets of euro coins being minted in 1999. The standard Belgian euro coins designated for circulation show the portrait of the monarch (first King Albert II, since 2013 King Philippe).
Document 8: Matterhorn: The Matterhorn (German: Matterhorn, (ˈmatərˌhɔrn); Italian: Cervino, (ˈtʃerˈviːno); French: Le Cervin, (mɔ̃ sɛʁvɛ̃)) is a mountain of the Alps, straddling the main watershed and border between Switzerland and Italy. It is a large, near - symmetrical pyramidal peak in the extended Monte Rosa area of the Pennine Alps, whose summit is 4,478 metres (14,692 ft) high, making it one of the highest summits in the Alps and Europe. The four steep faces, rising above the surrounding glaciers, face the four compass points and are split by the Hörnli, Furggen, Leone, and Zmutt ridges. The mountain overlooks the Swiss town of Zermatt, in the canton of Valais, to the north - east and the Italian town of Breuil - Cervinia in the Aosta Valley to the south. Just east of the Matterhorn is Theodul Pass, the main passage between the two valleys on its north and south sides, and a trade route since the Roman Era.
Document 9: Gornergrat: The Gornergrat (; ) is a rocky ridge of the Pennine Alps, overlooking the Gorner Glacier south-east of Zermatt in Switzerland. It can be reached from Zermatt by the Gornergrat rack railway (GGB), the highest open-air railway in Europe. Between the Gornergrat railway station () and the summit is the Kulm Hotel () hosting the new Project "Stellarium Gornergrat" and until 2010 the "Kölner Observatorium für SubMillimeter Astronomie" KOSMA and before that (until 2005) the Gornergrat Infrared Telescope.
Document 10: Switzerland at the 1920 Summer Olympics: Switzerland competed at the 1920 Summer Olympics in Antwerp, Belgium. 77 competitors, all men, took part in 45 events in 13 sports.
Document 11: Belgium: Kingdom of Belgium Koninkrijk België (Dutch) Royaume de Belgique (French) Königreich Belgien (German) Flag Coat of arms Motto: ``Eendracht maakt macht ''(Dutch)`` L'union fait la force'' (French) ``Einigkeit macht stark ''(German)`` Unity makes Strength'' Anthem: ``La Brabançonne ''`` The Brabantian'' Location of Belgium (dark green) -- in Europe (green & dark grey) -- in the European Union (green) Capital and largest city Brussels 50 ° 51 ′ N 4 ° 21 ′ E ﻿ / ﻿ 50.850 ° N 4.350 ° E ﻿ / 50.850; 4.350 Official languages Dutch French German Ethnic groups see Demographics Religion (2015) 60.7% Christianity 32.0% No religion 5.2% Islam 2.1% Other religions Demonym Belgian Government Federal parliamentary constitutional monarchy Monarch Philippe Prime Minister Charles Michel Legislature Federal Parliament Upper house Senate Lower house Chamber of Representatives Independence (from the Netherlands) Declared 4 October 1830 Recognised 19 April 1839 Area Total 30,528 km (11,787 sq mi) (136th) Water (%) 6.4 Population 1 August 2018 census 11,420,163 (79th) Density 374.2 / km (969.2 / sq mi) (36th) GDP (PPP) 2018 estimate Total $550.664 billion (38th) Per capita $48,258 (20th) GDP (nominal) 2016 estimate Total $562.229 billion (23rd) Per capita $49,272 (17th) Gini (2011) 26.3 low HDI (2017) 0.916 very high 17th Currency Euro (€) (EUR) Time zone UTC + 1 (CET) Summer (DST) UTC + 2 (CEST) Driving side right Calling code + 32 ISO 3166 code BE Internet TLD. be The flag's official proportions of 13: 15 are rarely seen; proportions of 2: 3 or similar are more common. The Brussels region is the de facto capital, but the City of Brussels municipality is the de jure capital. The. eu domain is also used, as it is shared with other European Union member states.
Document 12: Sweden at the 1920 Summer Olympics: Sweden competed at the 1920 Summer Olympics in Antwerp, Belgium. 260 competitors, 247 men and 13 women, took part in 100 events in 18 sports.
Document 13: Alps: The region is serviced by 4,200 km (2,600 mi) of roads used by 6 million vehicles. Train travel is well established in the Alps, with, for instance 120 km (75 mi) of track for every 1,000 km2 (390 sq mi) in a country such as Switzerland. Most of Europe's highest railways are located there. Moreover, plans are underway to build a 57 km (35 mi)-long sub-alpine tunnel connecting the older Lötschberg and Gotthard tunnels built in the 19th century.
Document 14: Norway at the 1920 Summer Olympics: Norway competed at the 1920 Summer Olympics in Antwerp, Belgium. 194 competitors, 188 men and 6 women, took part in 72 events in 16 sports.
Document 15: Monte Rosa Hotel: The Monte Rosa is a hotel, located in the main street of Zermatt. It was frequented by the members of the Alpine Club, including Edward Whymper who made the first ascent of the Matterhorn in 1865. The hotel is named after the highest mountain near Zermatt, Monte Rosa.
ground_truth: 11,420,163
sub_queries: Monte Rosa Hotel >> located in the administrative territorial entity Answer: Zermatt
Where are the villages of Wengen and Zermatt located? Answer: Switzerland
Switzerland at the 1920 Summer Olympics >> country Answer: Belgium
what is the population of Belgium in 2018 Answer: 11,420,163