(S (S (PP (VBG According) (PP (TO to) (BASENP (NNS firefighters)))) (COMMA ,) (S (NP (BASENP (JJ serious) (NNS breaches)) (PP (IN of) (BASENP (JJ fire-safety) (NNS regulations)))) (VP (VBD were) (VP (ADVP (RB partly)) (S (VP (TO to) (VP (VB blame) (PP (IN for) (BASENP (DT the) (NNS deaths)))))))))) (PERIOD .))