(S (S (S (BASENP (PRP It)) (VP (VBD took) (BASENP (JJ several) (NNS hours)))) (SBAR (IN before) (S (BASENP (NN security) (NNS forces)) (VP (VBD were) (ADJP (JJ able) (S (VP (TO to) (VP (VB gain) (NP (BASENP (NN control)) (PP (IN of) (BASENP (PDT all) (DT the) (NNS sites)))))))))))) (PERIOD .))