In fact, not only was the scramble prompted by the mistaken information about American 11, but NEADS never received notice that American 77 was hijacked.
( ( In fact ) ( , ( not ( only ( ( was ( ( the scramble ) ( prompted ( by ( ( the ( mistaken information ) ) ( about ( American 11 ) ) ) ) ) ) ) ( , ( but ( ( NEADS ( never ( ( received notice ) ( that ( ( American 77 ) ( was hijacked ) ) ) ) ) ) . ) ) ) ) ) ) ) )
(ROOT (S (PP (IN In) (NP (NN fact))) (, ,) (RB not) (ADVP (RB only)) (SINV (VBD was) (NP (NP (DT the) (NN scramble)) (VP (VBN prompted) (PP (IN by) (NP (NP (DT the) (JJ mistaken) (NN information)) (PP (IN about) (NP (NNP American) (CD 11)))))))) (, ,) (CC but) (S (NP (NNS NEADS)) (ADVP (RB never)) (VP (VBD received) (NP (NN notice)) (SBAR (IN that) (S (NP (NNP American) (CD 77)) (VP (VBD was) (VP (VBN hijacked))))))) (. .)))
The fact that American 77 was hijacked was never realized by NEADS.
( ( ( The fact ) ( that ( ( American 77 ) ( was hijacked ) ) ) ) ( ( ( was never ) ( realized ( by NEADS ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN fact)) (SBAR (IN that) (S (NP (NNP American) (CD 77)) (VP (VBD was) (VP (VBN hijacked)))))) (VP (VBD was) (ADVP (RB never)) (VP (VBN realized) (PP (IN by) (NP (NNP NEADS))))) (. .)))