(S (S (ADVP (RB However)) (COMMA ,) (S (S (BASENP (JJ Chadian) (NNS officials)) (VP (VBP have) (VP (ADVP (RB since)) (VP (VP (VBN described) (BASENP (DT the) (NN operation))) (PP (IN as) (NP (QT (DQL ``) (BASENP (NN kidnapping)) (DQR '')) (CC and) (QT (DQL ``) (BASENP (NN extortion)) (DQR '')))))))) (COMMA ,) (SBAR (IN while) (S (NP (BASENP (DT the) (NNP United) (NNPS Nations) (NNP High) (NNP Commissioner)) (PP (IN for) (BASENP (NNPS Refugees)))) (VP (VBD revealed) (SBAR (IN that) (S (NP (BASENP (JJ many)) (PP (IN of) (NP (BASENP (DT the) (NNS children)) (VP (VBN involved))))) (VP (VP (VBD were) (RB not)) (BASENP (NNS orphans)))))))))) (PERIOD .))