Complex sentence: Zithulele Sinqe (born 1963) is a South African long distance athlete who during the 1980's under apartheid in South Africa, emerged as one of the leading marathon and half-marathon athletes in the world.
Split into simpler sentences: Zithulele Sinqe (born 1963) is a South African long distance athlete. In the 1980s, and despite restictions under Apartheid, Sinqe emerged as one of the leading marathon and half-marathon athletes in the world.