(S (S (PP (IN In) (BASENP (DT some) (JJ recent) (NNS arrests))) (COMMA ,) (S (BASENP (NNS authorities)) (VP (VBP have) (VP (VP (VBN cited) (BASENP (JJ anti-terror) (NNS laws))) (PP (IN as) (BASENP (NN justification))))))) (PERIOD .))