Question: When did the country where Barend Cornelis Koekkoek was born refuse to surrender Namibia?

<P0-S0> juanita du plessis (née naude) is a famous afrikaans country singer, born on 26 april in windhoek, namibia. <P0-S1> she became known for her song "ska-rumba". <P0-S2> du plessis' singing career began in 1998 with her debut album "juanita". <P0-S3> that year she won the cma (country music association in namibia) awards as best singer, best songwriter and the association’s award for outstanding achievement. <SEP> <P1-S0> Koekkoek was born in Middelburg as the son of Johannes Hermanus Koekkoek and was the brother of Barend Cornelis and Hermanus. <P1-S1> His was the first teacher of his son Hendrik Pieter Koekkoek, who carried on his family's traditional style of romantic landscape painting. <SEP> <P2-S0> Boschmanskop No 1+2 Dam, is an earth-fill type dam on the Woes-Alleen River, near Middelburg, Mpumalanga, South Africa. <P2-S1> It was established in 1995. <P2-S2> Its primary purpose is flood control and it is owned by Optimum Colliery Pullen's Hope. <SEP> <P3-S0> although public opinion in paris was strongly against any form of surrender or concession to the prussians, the government realised that it could not hold the city for much longer, and that gambetta's provincial armies would probably never break through to relieve paris. <P3-S1> president trochu resigned on 25 january and was replaced by favre, who signed the surrender two days later at versailles, with the armistice coming into effect at midnight. <P3-S2> several sources claim that in his carriage on the way back to paris, favre broke into tears, and collapsed into his daughter's arms as the guns around paris fell silent at midnight. <P3-S3> at tours, gambetta received word from paris on 30 january that the government had surrendered. <P3-S4> furious, he refused to surrender and launched an immediate attack on german forces at orleans which, predictably, failed. <P3-S5> a delegation of parisian diplomats arrived in tours by train on 5 february to negotiate with gambetta, and the following day gambetta stepped down and surrendered control of the provincial armies to the government of national defence, which promptly ordered a cease-fire across france. <SEP> <P4-S0> South Africa occupied the colony in 1915 after defeating the German force during World War I and administered it from 1919 onward as a League of Nations mandate territory. <P4-S1> Although the South African government desired to incorporate 'South-West Africa' into its territory, it never officially did so, although it was administered as the de facto 'fifth province', with the white minority having representation in the whites-only Parliament of South Africa, as well as electing their own local administration the SWA Legislative Assembly. <P4-S2> The South African government also appointed the SWA administrator, who had extensive powers. <P4-S3> Following the League's replacement by the United Nations in 1946, South Africa refused to surrender its earlier mandate to be replaced by a United Nations Trusteeship agreement, requiring closer international monitoring of the territory's administration (along with a definite independence schedule). <P4-S4> The Herero Chief's Council submitted a number of petitions to the UN calling for it to grant Namibia independence during the 1950s. <P4-S5> During the 1960s, when European powers granted independence to their colonies and trust territories in Africa, pressure mounted on South Africa to do so in Namibia. <P4-S6> In 1966 the International Court of Justice dismissed a complaint brought by Ethiopia and Liberia against South Africa's continued presence in the territory, but the U.N. General Assembly subsequently revoked South Africa's mandate, while in 1971 the International Court of Justice issued an "advisory opinion" declaring South Africa's continued administration to be illegal.