Complex sentence: The first South African F1 race was held on 29 December 1962 at the East London track, where Briton Graham Hill took advantage of his countryman Jim Clark's mechanical problems with his Lotus and took race victory and the championship.
Split into simpler sentences: The first South African F1 race was held on 29 December 1962. In that race, Graham Hill took advantage of Jim Clark's mechanical problems with his Lotus and took race victory and the championship.