Question: What is the population of the country that hosted the 1920 Summer Olympics in which competed the home country of the singer of Je vais me marier, Marie

<P0-S0> 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. <P0-S1> be The flag's official proportions of 13: 15 are rarely seen; proportions of 2: 3 or similar are more common. <P0-S2> The Brussels region is the de facto capital, but the City of Brussels municipality is the de jure capital. <P0-S3> The. <P0-S4> eu domain is also used, as it is shared with other European Union member states. <SEP> <P1-S0> Patrick Juvet (born 21 August 1950, in Montreux, Switzerland) is a former model turned singer-songwriter, who had a string of hit records in France. <P1-S1> While his early career was focused on making pop records, he found international success as a disco music performer in the latter half of the 1970s. <SEP> <P2-S0> the 2018 winter olympics, officially known as the xxiii olympic winter games (korean: 제 23 회동계올림픽, translit. <P2-S1> jeisipsamhoe donggye ollimpik), officially stylized and commonly known as pyeongchang 2018, is an international multi-sport event currently being held from 9 to 25 february 2018 in pyeongchang county, south korea, with the opening rounds for certain events held on the eve of the opening ceremony -- 8 february 2018. pyeongchang was elected as the host in july 2011, during the 123rd ioc session in durban, south africa. <P2-S2> it marks the first time south korea has hosted the winter olympics, and the second olympics in the country overall after the 1988 summer olympics in the nation's capital, seoul. <P2-S3> it also marks the third time east asia has hosted the winter games, after sapporo, japan (1972), and nagano, japan (1998), and the sixth overall olympic games held in east asia. <P2-S4> it is the first of three consecutive olympic games scheduled to be held in east asia, preceding tokyo 2020 (summer) and beijing 2022 (winter). <SEP> <P3-S0> "Je vais me marier, Marie" (English translation: "I´m getting married, Mary") was the Swiss entry in the Eurovision Song Contest 1973, performed in French by Patrick Juvet. <SEP> <P4-S0> pyeongchang was elected as the host city in july 2011, during the 123rd ioc session in durban, south africa. <P4-S1> this was the first time that south korea had hosted the winter olympics and the second olympics held in the country overall, after the 1988 summer olympics in seoul. <P4-S2> it was the third time that an east asian country had hosted the winter games, after sapporo (1972) and nagano (1998), both in japan. <P4-S3> it was also the first of three consecutive olympics to be held in east asia, the other two being the 2020 summer olympics in tokyo and the 2022 winter olympics in beijing. <SEP> <P5-S0> Switzerland competed at the 1920 Summer Olympics in Antwerp, Belgium. <P5-S1> 77 competitors, all men, took part in 45 events in 13 sports.