(S (S (BASENP (NN Twenty) (NNS people)) (VP (PP (IN since) (BASENP (NN 1991))) (VP (VBP have) (VP (VBN been) (VP (VP (VBN charged) (PP (IN under) (BASENP (DT the) (NNP Security) (NNP Certificate) (NN legislation)))) (PP (IN in) (BASENP (NNP Canada)))))))) (PERIOD .))