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 did not achieve it.
( ( The dispatchers ) ( ( ( did not ) ( achieve it ) ) . ) )
(ROOT (S (NP (DT The) (NNS dispatchers)) (VP (VBD did) (RB not) (VP (VB achieve) (NP (PRP it)))) (. .)))