(S (S (QT (DQL ``) (QTC (S (S (INTJ (UH Yes)) (COMMA ,) (S (BASENP (NNP al) (NNP Qaeda)) (VP (VBD attacked) (BASENP (NN oil) (NNS installations))))) (CC but) (S (S (BASENP (PRP they)) (VP (VP (VBD were) (RB not)) (BASENP (DT the) (JJ only) (NNS actors)))) (CC and) (S (BASENP (PRP they)) (VP (VP (VBD were) (RB not)) (BASENP (DT the) (JJ main) (NNS actors)))))) (COMMA ,)) (DQR '')) (S (BASENP (PRP he)) (VP (VBD said)))) (PERIOD .))