paragraph_text: Namibia's primary tourism related governing body, the Namibia Tourism Board (NTB), was established by an Act of Parliament: the Namibia Tourism Board Act, 2000 (Act 21 of 2000). Its primary objectives are to regulate the tourism industry and to market Namibia as a tourist destination. There are also a number of trade associations that represent the tourism sector in Namibia, such as the Federation of Namibia Tourism Associations (the umbrella body for all tourism associations in Namibia), the Hospitality Association of Namibia, the Association of Namibian Travel Agents, Car Rental Association of Namibia and the Tour and Safari Association of Namibia.

paragraph_text: The Calabar River in Cross River State, Nigeria flows from the north past the city of Calabar, joining the larger Cross River about to the south. The river at Calabar forms a natural harbor deep enough for vessels with a draft of .

paragraph_text: Bhilangna River is a Himalayan river in Uttarakhand, India, which is the major tributary of the Bhagirathi river, the source stream of the Ganges River of India.

paragraph_text: The first Europeans to disembark and explore the region were the Portuguese navigators Diogo Cão in 1485 and Bartolomeu Dias in 1486; still the region was not claimed by the Portuguese crown. However, like most of Sub-Saharan Africa, Namibia was not extensively explored by Europeans until the 19th century, when traders and settlers arrived, principally from Germany and Sweden. In the late 19th century Dorsland trekkers crossed the area on their way from the Transvaal to Angola. Some of them settled in Namibia instead of continuing their journey.

paragraph_text: Namibia (i/nəˈmɪbiə/, /næˈ-/), officially the Republic of Namibia (German:  Republik Namibia (help·info); Afrikaans: Republiek van Namibië) is a country in southern Africa whose western border is the Atlantic Ocean. It shares land borders with Zambia and Angola to the north, Botswana to the east and South Africa to the south and east. Although it does not border Zimbabwe, a part of less than 200 metres of the Zambezi River (essentially a small bulge in Botswana to achieve a Botswana/Zambia micro-border) separates it from that country. Namibia gained independence from South Africa on 21 March 1990, following the Namibian War of Independence. Its capital and largest city is Windhoek, and it is a member state of the United Nations (UN), the Southern African Development Community (SADC), the African Union (AU), and the Commonwealth of Nations.

paragraph_text: The Molopo River () is one of the main rivers in Southern Africa. It has a length of approximately 960 kilometres and a catchment area of 367,201 km with Botswana, Namibia and South Africa sharing roughly about a third of the basin each.

paragraph_text: Many bird species migrate to take advantage of global differences of seasonal temperatures, therefore optimising availability of food sources and breeding habitat. These migrations vary among the different groups. Many landbirds, shorebirds, and waterbirds undertake annual long distance migrations, usually triggered by the length of daylight as well as weather conditions. These birds are characterised by a breeding season spent in the temperate or polar regions and a non-breeding season in the tropical regions or opposite hemisphere. Before migration, birds substantially increase body fats and reserves and reduce the size of some of their organs. Migration is highly demanding energetically, particularly as birds need to cross deserts and oceans without refuelling. Landbirds have a flight range of around 2,500 km (1,600 mi) and shorebirds can fly up to 4,000 km (2,500 mi), although the bar-tailed godwit is capable of non-stop flights of up to 10,200 km (6,300 mi). Seabirds also undertake long migrations, the longest annual migration being those of sooty shearwaters, which nest in New Zealand and Chile and spend the northern summer feeding in the North Pacific off Japan, Alaska and California, an annual round trip of 64,000 km (39,800 mi). Other seabirds disperse after breeding, travelling widely but having no set migration route. Albatrosses nesting in the Southern Ocean often undertake circumpolar trips between breeding seasons.

paragraph_text: The sources of the Congo are in the highlands and mountains of the East African Rift, as well as Lake Tanganyika and Lake Mweru, which feed the Lualaba River, which then becomes the Congo below Boyoma Falls. The Chambeshi River in Zambia is generally taken as the source of the Congo in line with the accepted practice worldwide of using the longest tributary, as with the Nile River.

paragraph_text: The river Khan is an ephemeral river crossing the Erongo region of central Namibia. It is the main tributary of the Swakop River and only occasionally carries surface water during the rain seasons in November and February/March.

paragraph_text: Orange Gariep, Oranje, Senqu River Sunset over the Orange River near Upington in the Northern Cape Countries Lesotho, South Africa, Namibia Tributaries - right Caledon River, Vaal River, Fish River (Namibia) Landmarks Gariep Dam, Augrabies Falls Source Thaba Putsoa - location Maloti Mountains (Drakensberg), Lesotho - elevation 3,350 m (10,991 ft) Mouth Alexander Bay - location Atlantic Ocean Length 2,200 km (1,367 mi) Basin 973,000 km (375,677 sq mi) Discharge - average 365 m / s (12,890 cu ft / s) The course and watershed of the Orange River, Caledon River and Vaal River. This map shows a conservative border for the watershed. Specifically, the Kalahari basin is excluded, as some sources say it is endorheic. Some other sources using computational methods show a basin which includes parts of Botswana (and hence of the Kalahari).

paragraph_text: The Werre is a river in the Detmold region (Regierungsbezirk) of North Rhine-Westphalia, Germany, left tributary of the Weser. Its source is near Horn-Bad Meinberg. The Werre flows generally north through the towns Detmold, Lage, Bad Salzuflen, Herford and Löhne. It flows into the Weser close to Bad Oeynhausen. The total length of the Werre is 71.9 km. It crosses the districts of Lippe, Herford and Minden-Lübbecke.

paragraph_text: The Tavo is a river in the Abruzzo region of Italy. Its source is in the Gran Sasso d'Italia mountain range in the province of L'Aquila near the border with the province of Pescara. After crossing the border, the river loops northward and then eastward near Penne. It then flows south and then northeast and flows near Loreto Aprutino and Pianella. The river continues flowing northeast near Cappelle sul Tavo before joining the Fino and together they become the Saline.

paragraph_text: Jonker Afrikaner ( 1785, "Roode Zand" near Tulbagh, South Africa – 18 August 1861, Okahandja, South West Africa) was the fourth Captain of the Orlam in South West Africa, succeeding his father, Jager Afrikaner, in 1823. Soon after becoming "Kaptein", he left his father’s settlement at Blydeverwacht with three brothers and some 300 followers and relocated to the area that is today central Namibia. From 1825 onwards he and his council played a dominant political role in Damaraland and Namaland, creating a "de facto" state.

paragraph_text: Meat Corporation of Namibia, locally known as MeatCo, is a meat processing company headquartered in Windhoek, the capital of Namibia. It is the largest exporter of prime beef in Namibia.

paragraph_text: The dry lands of Namibia were inhabited since early times by San, Damara, Nama and, since about the 14th century AD, by immigrating Bantu who came with the Bantu expansion from central Africa. From the late 18th century onwards, Orlam clans from the Cape Colony crossed the Orange River and moved into the area that today is southern Namibia. Their encounters with the nomadic Nama tribes were largely peaceful. The missionaries accompanying the Orlams were well received by them, the right to use waterholes and grazing was granted against an annual payment. On their way further northwards, however, the Orlams encountered clans of the Herero tribe at Windhoek, Gobabis, and Okahandja which were less accommodating. The Nama-Herero War broke out in 1880, with hostilities ebbing only when Imperial Germany deployed troops to the contested places and cemented the status quo between Nama, Orlams, and Herero.

paragraph_text: The Mayuni Conservancy is a conservation area in Linyanti Constituency, in Namibia's northeastern Caprivi Region, along the eastern bank of the Cuando River.

paragraph_text: Providing 25% of Namibia's revenue, mining is the single most important contributor to the economy. Namibia is the fourth largest exporter of non-fuel minerals in Africa and the world's fourth largest producer of uranium. There has been significant investment in uranium mining and Namibia is set to become the largest exporter of uranium by 2015. Rich alluvial diamond deposits make Namibia a primary source for gem-quality diamonds. While Namibia is known predominantly for its gem diamond and uranium deposits, a number of other minerals are extracted industrially such as lead, tungsten, gold, tin, fluorspar, manganese, marble, copper and zinc. There are offshore gas deposits in the Atlantic Ocean that are planned to be extracted in the future. According to "The Diamond Investigation", a book about the global diamond market, from 1978, De Beers, the largest diamond company, bought most of the Namibian diamonds, and would continue to do so, because "whatever government eventually comes to power they will need this revenue to survive".

paragraph_text: Peace River, originally named Peace River Crossing, and known as Rivière-la-Paix in French, is a town in northwestern Alberta, Canada, situated along the banks of the Peace River, at its confluence with the Smoky River, the Heart River and Pat's Creek. It is located northwest of Edmonton, and northeast of Grande Prairie, along Highway 2. It was known as the Village of Peace River Crossing between 1914 and 1916.

paragraph_text: The Omaruru River is a major river crossing the Erongo Region of western central Namibia from East to West. It originates in the Etjo mountains, crosses the city of Omaruru and reaches the sea a few kilometers north of Henties Bay.

paragraph_text: The Hargrave River is a river in the Hudson Bay drainage basin in Northern Manitoba, Canada. It flows in a southeasterly direction from its source at Hargrave Lake to Hill Lake on the Minago River which flows into Cross Lake on the Nelson River.

Question: What is the source of the river Orlam clans crossed to migrate to Namibia?
Answer: Thaba Putsoa