The passengers continued their assault and at 10:02:23, a hijacker said, Pull it down!
( ( ( ( ( The passengers ) ( continued ( their assault ) ) ) and ) ( ( at 10:02:23 ) ( , ( ( a hijacker ) ( ( said , ) ( ( Pull it ) down ) ) ) ) ) ) ! )
(ROOT (S (S (NP (DT The) (NNS passengers)) (VP (VBD continued) (NP (PRP$ their) (NN assault)))) (CC and) (S (PP (IN at) (NP (CD 10:02:23))) (, ,) (NP (DT a) (NN hijacker)) (VP (VBD said) (, ,) (S (VP (VBG Pull) (NP (PRP it)) (PRT (RP down)))))) (. !)))
The assault by the passengers did not begin until 10:10:00.
( ( ( The assault ) ( by ( the passengers ) ) ) ( ( ( did not ) ( begin ( until 10:10:00 ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN assault)) (PP (IN by) (NP (DT the) (NNS passengers)))) (VP (VBD did) (RB not) (VP (VB begin) (PP (IN until) (NP (CD 10:10:00))))) (. .)))