(S (S (S (BASENP (DT The) (NNP Zasyadko) (NN mine)) (VP (VBZ is) (ADJP (BASENP (QP (RB nearly) (NN 1,000)) (NNS meters)) (JJ deep)))) (CONJP (COMMA ,) (CC and)) (S (S (BASENP (NN 457) (NNS people)) (VP (VBD were) (PP (IN in) (BASENP (DT the) (NN mine))))) (SBAR (WHADVP (WRB when)) (S (BASENP (DT the) (NN explosion)) (VP (VBD occurred) (PP (IN at) (BASENP (NN 3:11) (NN am)))))))) (PERIOD .))