(S (S (BASENP (JJ Several) (NNS protesters)) (VP (VBD claimed) (SBAR (IN that) (S (BASENP (NNP Sydney)) (VP (VBD had) (VP (VBN been) (VP (VP (VBN turned) (PP (IN into) (NP (DT a) (QT (DQL ``) (BASENP (NN police) (NN state)) (DQR ''))))) (PP (IN as) (NP (BASENP (DT a) (NN result)) (PP (IN of) (BASENP (DT the) (NN security) (NNS measures)))))))))))) (PERIOD .))