(S (S (NP (BASENP (NN Three) (NN rescue) (NNS workers)) (PP (IN at) (NP (BASENP (DT the) (NNP Crandall) (NNP Canyon) (NNP Mine)) (PP (IN in) (BASENP (NNP Utah)))))) (VP (VBD were) (VP (VBN killed) (S (VP (VBG trying) (S (VP (TO to) (VP (VB rescue) (NP (BASENP (NN six) (VBN trapped) (NNS miners)) (SBAR (WHNP (WP who)) (S (VP (VBP have) (VP (VP (VBN been) (ADJP (JJ missing))) (PP (IN for) (BASENP (QP (RB over) (DT a)) (NN week)))))))))))))))) (PERIOD .))