 Complete the following phrase:  The first South African Grands Prix were held on a road course known as the Prince George Circuit, running through different populated areas of the coastal city of East London. This was shortened to in 1936. When racing resumed after World War II, a permanent circuit was built in 1959 that retained the name Prince George Circuit. The first World Championship F1 race in South Africa was held on 29 December 1962. In that race, Graham Hill took advantage of Jim Clarks mechanical problems with his Lotus and took race victory and the championship. The race was held at Prince George again in 