(S (S (BASENP (NNS Reports)) (VP (VBP say) (SBAR (IN that) (S (BASENP (DT the) (NN chopper)) (VP (VP (VBD went) (PRT (RP down))) (PP (IN near) (NP (NP (BASENP (DT the) (NNP U.S.) (NN air) (NN base)) (COMMA ,) (BASENP (NNP Taji))) (COMMA ,) (VP (VBN located) (ADVP (ADVP (RB just)) (ADVP (RB north) (PP (IN of) (BASENP (JJ downtown) (NNP Baghdad))))))))))))) (PERIOD .))