At the same time, Boston Center realized that a message transmitted just before 8:25 by the hijacker pilot of American 11 included the phrase, We have some planes.
( ( At ( the ( same time ) ) ) ( , ( ( Boston Center ) ( ( realized ( that ( ( a message ) ( transmitted ( ( just ( before ( ( 8:25 ( by ( ( the ( hijacker pilot ) ) ( of ( American 11 ) ) ) ) ) ( included ( the phrase ) ) ) ) ) ( , ( We ( have ( some planes ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN At) (NP (DT the) (JJ same) (NN time))) (, ,) (NP (NNP Boston) (NNP Center)) (VP (VBD realized) (SBAR (IN that) (S (NP (DT a) (NN message)) (VP (VBD transmitted) (SBAR (S (SBAR (RB just) (IN before) (S (NP (NP (CD 8:25)) (PP (IN by) (NP (NP (DT the) (NN hijacker) (NN pilot)) (PP (IN of) (NP (NNP American) (CD 11)))))) (VP (VBD included) (NP (DT the) (NN phrase))))) (, ,) (NP (PRP We)) (VP (VBP have) (NP (DT some) (NNS planes))))))))) (. .)))
No messages were transmitted by hijackers before 8:30.
( ( No messages ) ( ( were ( ( transmitted ( by hijackers ) ) ( before 8:30 ) ) ) . ) )
(ROOT (S (NP (DT No) (NNS messages)) (VP (VBD were) (VP (VBN transmitted) (PP (IN by) (NP (NNS hijackers))) (PP (IN before) (NP (CD 8:30))))) (. .)))