(S (S (BASENP (NNP Akpan)) (VP (ADVP (RB further)) (VP (VBD said) (SBAR (IN that) (S (BASENP (NNS officials)) (VP (VBD had) (VP (VBN seen) (S (BASENP (JJ young) (NNS children)) (VP (VBG playing) (PP (IN in) (NP (BASENP (JJ contaminated) (NN water)) (VP (VBN located) (PP (IN near) (BASENP (DT the) (NN mining) (NNS sites))))))))))))))) (PERIOD .))