(S (S (BASENP (NNS Officials)) (VP (VBP state) (SBAR (IN that) (S (BASENP (DT the) (NN mine)) (VP (MD will) (VP (VP (VB remain) (S (VP (VBN closed) (PP (IN for) (NP (BASENP (DT a) (NN minimum)) (PP (IN of) (BASENP (NN six) (NNS weeks)))))))) (COMMA ,) (SBAR (IN while) (S (S (BASENP (DT an) (NN investigation)) (VP (VBZ is) (VP (VBN performed)))) (CONJP (COMMA ,) (CC and)) (S (BASENP (DT the) (NN mine)) (VP (VBZ is) (VP (VBN deemed) (ADJP (JJ safe) (SBAR (IN for) (S (BASENP (NNS miners)) (VP (TO to) (VP (VB continue) (S (VP (VBG working) (PP (IN in) (BASENP (PRP it))))))))))))))))))))) (PERIOD .))