Question: Which country shares borders with Zambia, Angola, and Botswana and is the birthplace of Martin van Niekerk?

Context paragraphs:
Willie van Niekerk: Willem (Willie) Abraham van Niekerk (29 June 1937 in Pretoria – 8 August 2009) was a South African physician, professor, and politician.  Van Niekerk was Minister of Health in the government of P. W. Botha from 1985 to 1989 and Administrator-General of South West Africa from 1983 to 1985.  He specialized in cytogenetics, cell biology, gynecology, and obstetrics.

Namibia: Namibia ( , ), officially the Republic of Namibia (German:    ; 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 the two countries.  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.

Ziwa: Ziwa, or Ziwa ruins (formerly Van Niekerk ruins after Major Pompey Van Niekerk who was second in command of the Afrikaner Corps) is the name used to describe the remains of a vast late Iron Age agricultural settlement that has been dated to the 17th century.  The site is located in Nyanga, Zimbabwe.  Ziwa was declared a National Monument in 1946 and is currently under consideration for World Heritage listing.  The site contains a large variety of stonework structures including stone terraces running along contours of hills and steep landscapes.  Archaeological investigations have also engendered important aspects of pottery and rock art.

Peter van Niekerk: Petrus Reininus Johannes "Peter" van Niekerk (born 30 November 1971 in Hazerswoude) is a sailor from the Netherlands, who represented his country for the first time at the 2000 Summer Olympics in Sydney.  With Roy Heiner as helmsman and Dirk de Ridder as fellow crew member, Van Niekerk took the 4th place in the Soling.  In the 2004 Olympics in Athena Van Niekerk made his second Olympic appearance.  This time in the Dutch Star with Mark Neeleman as helmsman.  They took 14th place.

Kavango–Zambezi Transfrontier Conservation Area: Kavango–Zambezi Transfrontier Conservation Area (KAZA) is situated in a region where the international borders of five countries converge.  It includes a major part of the Upper Zambezi basin and the Okavango basin and Delta.  The zone includes the Caprivi Strip of Namibia, the southeastern corner of Angola, southwestern Zambia, the northern wildlands of Botswana and western Zimbabwe.  The centre of this area is at the confluence of the Chobe River and Zambezi River where the borders of Botswana, Namibia, Zambia and Zimbabwe meet.  It will incorporate notable sites such as Chobe National Park, Hwange National Park, the Okavango Delta in Botswana and the Victoria Falls.

Martin van Niekerk: Martin van Niekerk (born Izak Marthinus van Niekerk on 29 May 1989) is a South African-born Namibian cricketer.  He is a right-handed batsman and right-arm medium-fast bowler.  He was born in Pretoria.

List of companies of Namibia: Namibia 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 the two countries.  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.

Geography of Albania: The Geography of Albania is defined by its location.  Albania is a small predominantly mountainous country in Southeastern Europe, on facing the Adriatic and Ionian seas within the Mediterranean Sea.  Albania covers a territory of 28748 km2 , making it the 145th largest country in the world.  It lies mostly between latitudes 42° and 39° N, and longitudes 21° and 19° E.  The country shares borders with Montenegro in the northwest, Kosovo in the northeast, Macedonia in the east and Greece in the south.  It's coastline length on the Adriatic and the Ionian Seas is 476 km .  The lowlands of the west face the Adriatic Sea and the strategically important Strait of Otranto, which puts less than 72 km of water between Albania and the heel of the Italian coast.

Joe van Niekerk: Johann "Joe" van Niekerk (born 14 May 1980 in Port Elizabeth) is a South African rugby union player, who generally plays either as a flanker or number 8.  He currently plays for Toulon in the Top 14. Joe van Niekerk one of the greatest captains of the roads of Toulon as a warrior.

San people: The San people (or Saan), are members of various Khoisan-speaking indigenous hunter-gatherer people representing the first nation of Southern Africa, whose territories span Botswana, Namibia, Angola, Zambia, Zimbabwe, Lesotho and South Africa.  There is a significant linguistic difference between the northern people living between the Okavango River in Botswana and Etosha National Park in northwestern Namibia, extending up into southern Angola; the central people of most of Namibia and Botswana, extending into Zambia and Zimbabwe; and the southern people in the central Kalahari towards the Molopo River, who are the last remnant of the previously extensive indigenous San of South Africa.

Supporting paragraphs: Martin van Niekerk Namibia
Answer: Namibia