(S (S (BASENP (PRP They)) (VP (VBP claim) (SBAR (IN that) (S (NP (BASENP (NN pollution)) (VP (VBN caused) (PP (IN by) (NP (BASENP (DT the) (NN company) (POS 's)) (BASENP (NN mining) (NNS activities)))))) (VP (VBZ has) (VP (VBN caused) (NP (NP (BASENP (JJ serious) (NNS illnesses)) (CC and) (BASENP (JJ other) (NN health) (NNS problems))) (COMMA ,) (PP (VBG including) (NP (NP (NP (BASENP (NN skin) (NN disease)) (COMMA ,) (BASENP (NNS tumors))) (COMMA ,) (BASENP (NN birth) (NNS defects))) (CONJP (COMMA ,) (CC and)) (NP (BASENP (DT a) (NN decline)) (PP (IN in) (NP (BASENP (NN fish) (NNS stocks)) (COMMA ,) (BASENP (DT a) (NN staple) (NN food)))))))))))))) (PERIOD .))