(S (S (NP (QP (ADJP (ADJP (RB As) (JJ many)) (IN as)) (NN 3,200)) (BASENP (NN mine) (NNS workers))) (VP (VBD became) (VP (VP (VP (VBN trapped) (PP (IN in) (NP (DT the) (PP (IN in) (NP (BASENP (NNP Elandsrand) (NN mine)) (COMMA ,) (NP (BASENP (DT a) (NN gold) (NN mine)) (PP (IN in) (BASENP (NNP South) (NNP Africa))))))))) (ADVP (NP (BASENP (QP (RB about) (NN 50)) (NNS miles)) (PRN (LRB -LRB-) (BASENP (NN 80) (NN km)) (RRB -RRB-))) (ADVP (RB west) (PP (IN of) (NP (BASENP (NNP Johannesburg)) (PP (IN in) (NP (BASENP (NNP Carletonville)) (COMMA ,) (BASENP (NNP Gauteng))))))))) (COMMA ,) (PP (IN after) (NP (BASENP (DT an) (NN incident)) (PP (IN on) (BASENP (NNP October) (NN 3)))))))) (PERIOD .))