(S (S (PP (IN In) (NP (BASENP (DT a) (NN statement)) (VP (VBN posted) (PP (IN on) (NP (BASENP (DT an) (NNP Al-Qaeda)) (PP (IN in) (BASENP (NNP Iraq) (NN website)))))))) (COMMA ,) (S (BASENP (NNS insurgents)) (VP (VBP claim) (NP (BASENP (NN responsibility)) (PP (IN for) (S (VP (VP (VBG shooting) (PRT (RP down))) (BASENP (DT the) (NN helicopter))))))))) (PERIOD .))