(S (S (NP (BASENP (DT The) (NNP UN) (NNP World) (NNP Health) (NNP Organization)) (PRN (LRB -LRB-) (BASENP (NNP WHO)) (RRB -RRB-))) (VP (VBZ says) (SBAR (FRAG (S (BASENP (QP (RB about) (NN 35,000)) (NNS people)) (VP (VBP have) (VP (VBN fallen) (BASENP (NN ill))))) (COMMA ,) (FRAG (BASENP (NN half) (DT the) (NNS victims)) (PP (IN in) (NP (NP (BASENP (DT the) (NN capital)) (PP (IN of) (BASENP (NNP Luanda)))) (COMMA ,) (SBAR (WHADVP (WRB where)) (S (BASENP (DT the) (JJ first) (NNS cases)) (VP (VBD were) (VP (VBN detected) (PP (IN in) (BASENP (NNP February)))))))))))))) (PERIOD .))