At least some FAA officials in Boston Center and the New England Region knew that a hijacker on board American 11 had said we have some planes.
( ( ( ( ( At least ) some ) ( FAA officials ) ) ( in ( ( ( Boston Center ) and ) ( the ( New ( England Region ) ) ) ) ) ) ( ( knew ( that ( ( ( a hijacker ) ( on ( board ( American 11 ) ) ) ) ( had ( said ( we ( have ( some planes ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (QP (IN At) (JJS least) (DT some)) (NNP FAA) (NNS officials)) (PP (IN in) (NP (NP (NNP Boston) (NNP Center)) (CC and) (NP (DT the) (NNP New) (NNP England) (NNP Region))))) (VP (VBD knew) (SBAR (IN that) (S (NP (NP (DT a) (NN hijacker)) (PP (IN on) (NP (NN board) (NNP American) (CD 11)))) (VP (VBD had) (VP (VBD said) (SBAR (S (NP (PRP we)) (VP (VBP have) (NP (DT some) (NNS planes)))))))))) (. .)))
FAA officials in Boston Center were aware of a hijacker on American 11.
( ( ( FAA officials ) ( in ( Boston Center ) ) ) ( ( were ( aware ( of ( ( a hijacker ) ( on ( American 11 ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP FAA) (NNS officials)) (PP (IN in) (NP (NNP Boston) (NNP Center)))) (VP (VBD were) (ADJP (JJ aware) (PP (IN of) (NP (NP (DT a) (NN hijacker)) (PP (IN on) (NP (NNP American) (CD 11))))))) (. .)))