(S (S (PP (IN At) (NP (NP (BASENP (RB roughly) (NN 0700)) (BASENP (NNP BST))) (PP (IN on) (NP (BASENP (NNP September) (NN 18)) (COMMA ,) (BASENP (NN 1959)))))) (COMMA ,) (S (S (NP (BASENP (NN 47) (NNS men)) (SBAR (WHNP (WP who)) (S (VP (VBD were) (VP (VBG working) (PP (IN in) (NP (BASENP (NNP Auchengeich) (NNP Collery)) (PP (IN in) (NP (BASENP (NNP North) (NNP Lanarkshire)) (COMMA ,) (BASENP (NNP Scotland))))))))))) (VP (VBD were) (VP (VBN overcome) (PP (IN by) (BASENP (NN smoke)))))) (SBAR (IN as) (S (BASENP (PRP they)) (VP (VBD were) (VP (VP (VBG walking) (PRT (RP down))) (S (VP (TO to) (VP (VB start) (BASENP (NN work))))))))))) (PERIOD .))