(S (S (BASENP (DT The) (NN poll)) (VP (VBD was) (VP (VBN commissioned) (PP (IN by) (NP (BASENP (NN 911truth) (PERIOD .) (NN org)) (COMMA ,) (NP (BASENP (DT a) (JJ single) (NN issue) (NN website)) (VP (VBN aimed) (PP (IN at) (S (VP (VP (VBG pinning) (NP (BASENP (DT the) (NN blame)) (PP (IN of) (BASENP (NN 9/11))))) (PP (IN on) (BASENP (DT the) (NNP Bush) (NN administration))))))))))))) (PERIOD .))