The airlines bore responsibility, too.
( ( The airlines ) ( ( ( ( bore responsibility ) , ) too ) . ) )
(ROOT (S (NP (DT The) (NNS airlines)) (VP (VBD bore) (NP (NN responsibility)) (, ,) (ADVP (RB too))) (. .)))
The airlines were not responsible, the FAA was.
( ( ( The airlines ) ( ( were not ) responsible ) ) ( , ( ( the FAA ) ( was . ) ) ) )
(ROOT (S (S (NP (DT The) (NNS airlines)) (VP (VBD were) (RB not) (ADJP (JJ responsible)))) (, ,) (NP (DT the) (NNP FAA)) (VP (VBD was)) (. .)))