(S (S (PP (IN In) (BASENP (NN 2009))) (S (BASENP (DT the) (NNP World) (NNP Health) (NNP Organization)) (VP (VBD reported) (SBAR (IN that) (S (BASENP (QP (RB approximately) (NN 1,600)) (NNS children)) (VP (VBD were) (VP (VP (VBN paralysed) (PP (IN by) (BASENP (DT the) (NN virus)))) (ADVP (RB worldwide))))))))) (PERIOD .))