(S (S (S (BASENP (DT The) (NN mine)) (VP (VBZ is) (VP (VBN located) (PP (IN in) (NP (BASENP (DT the) (NNP Witwatersrand) (NNP Basin)) (PP (IN of) (BASENP (NNP South) (NNP Africa)))))))) (COMMA ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (VP (VBN said) (S (VP (TO to) (VP (VB be) (NP (BASENP (DT the) (NN location)) (PP (IN of) (NP (NP (BASENP (DT the) (JJS largest) (NN area)) (PP (IN of) (BASENP (JJ raw) (NN gold)))) (PP (IN on) (BASENP (DT the) (NN planet)))))))))))))) (PERIOD .))