American Airlines dispatchers also tried, without success.
( ( American ( Airlines dispatchers ) ) ( also ( ( ( tried , ) ( without success ) ) . ) ) )
(ROOT (S (NP (NNP American) (NNPS Airlines) (NNS dispatchers)) (ADVP (RB also)) (VP (VBD tried) (, ,) (PP (IN without) (NP (NN success)))) (. .)))
The dispatchers were trying to help.
( ( The dispatchers ) ( ( were ( trying ( to help ) ) ) . ) )
(ROOT (S (NP (DT The) (NNS dispatchers)) (VP (VBD were) (VP (VBG trying) (S (VP (TO to) (VP (VB help)))))) (. .)))