(S (S (BASENP (DT The) (NN government)) (VP (VBZ has) (VP (VBN pledged) (S (VP (TO to) (VP (VP (VP (VB crack) (PRT (RP down))) (PP (IN upon) (BASENP (JJ illegal) (NNS mines)))) (CC and) (VP (VB enforce) (BASENP (NN safety) (NNS rules))))))))) (PERIOD .))