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))))))))) (. .)))
It took the Boston Center 10 minutes to realize what the hijackers had said.
( It ( ( ( ( took ( the ( Boston Center ) ) ) ( 10 minutes ) ) ( to ( realize ( what ( ( the hijackers ) ( had said ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBD took) (NP (DT the) (NNP Boston) (NNP Center)) (NP (CD 10) (NNS minutes)) (S (VP (TO to) (VP (VB realize) (SBAR (WHNP (WP what)) (S (NP (DT the) (NNS hijackers)) (VP (VBD had) (VP (VBN said))))))))) (. .)))