(S (S (NP (BASENP (NN Police)) (CC and) (BASENP (NN fire) (NNS crews))) (VP (VP (VBD arrived) (PP (IN on) (BASENP (NN scene)))) (S (VP (TO to) (VP (VB discover) (NP (NP (BASENP (DT a) (NN power) (NN surge)) (PP (IN in) (BASENP (DT the) (JJ 27th) (NN floor)))) (SBAR (S (VP (VP (VP (VBD knocked) (PRT (RP out))) (NP (BASENP (DT all) (NNS communications)) (PP (IN between) (NP (NP (BASENP (DT the) (NN police)) (CC and) (BASENP (NN fire) (NNS departments))) (PP (IN in) (BASENP (DT the) (NN city))))))) (PP (IN for) (BASENP (QP (RB nearly) (NN two)) (NNS hours)))))))))))) (PERIOD .))