(S (S (NP (BASENP (RB Around) (NN 6:00)) (BASENP (JJ local) (NN time))) (COMMA ,) (S (PP (IN on) (BASENP (NNP Friday))) (COMMA ,) (S (NP (BASENP (DT the) (NN system)) (PRN (COMMA ,) (VP (VBN fed) (PP (IN by) (BASENP (JJ warm) (NN winter) (NN air)))) (COMMA ,))) (VP (VP (VBD caused) (BASENP (JJ several) (NNS injuries))) (COMMA ,) (S (VP (VBG damaging) (BASENP (DT the) (NN power) (NN grid)))))))) (PERIOD .))