(S (S (BASENP (NN Lead) (NN poisoning)) (VP (VBZ has) (VP (VP (VP (VBN taken) (NP (BASENP (DT the) (NNS lives)) (PP (IN of) (NP (QP (ADVP (IN at) (JJS least)) (NN 163)) (NNS individuals))))) (PP (IN in) (NP (BASENP (DT the) (JJ northern) (JJ Nigerian) (NN state)) (PP (IN of) (BASENP (NNP Zamfara)))))) (PP (IN in) (BASENP (JJ recent) (NNS weeks)))))) (PERIOD .))