(S (S (S (BASENP (NN Rescue) (NNS operations)) (VP (VBP have) (VP (VBN commenced)))) (CC and) (S (PP (IN at) (BASENP (JJ last) (NN report))) (S (BASENP (PRP they)) (VP (VBD were) (NP (BASENP (NN 1,400) (NNS feet)) (PP (IN from) (NP (BASENP (DT the) (NN location)) (PP (IN of) (BASENP (DT the) (NNS miners)))))))))) (PERIOD .))