(S (S (S (BASENP (NNS Officials)) (VP (VBD said) (SBAR (IN that) (S (BASENP (PRP it)) (VP (VP (VBD was) (ADJP (JJ unlikely))) (SBAR (IN that) (S (BASENP (DT the) (JJ missing) (NNS miners)) (VP (VP (VBD were) (ADVP (RB still))) (ADJP (JJ alive)))))))))) (COMMA ,) (SBAR (IN although) (S (S (BASENP (PRP they)) (VP (VP (MD would) (RB not)) (VP (VB stop) (BASENP (NNS efforts))))) (SBAR (IN until) (S (BASENP (PRP they)) (VP (VBD were) (VP (VBN found)))))))) (PERIOD .))