American also began getting identifications of the hijackers, as Ong and then Sweeney passed on some of the seat numbers of those who had gained unauthorized access to the cockpit.
( ( ( ( ( American ( also ( ( ( began ( getting ( identifications ( of ( the hijackers ) ) ) ) ) , ) ( as Ong ) ) ) ) and ) then ) ( Sweeney ( passed ( on ( some ( of ( ( the ( seat numbers ) ) ( of ( those ( who ( had ( ( gained ( unauthorized access ) ) ( to ( the cockpit ) ) ) ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNP American)) (ADVP (RB also)) (VP (VBD began) (S (VP (VBG getting) (NP (NP (NNS identifications)) (PP (IN of) (NP (DT the) (NNS hijackers)))))) (, ,) (PP (IN as) (NP (NNP Ong))))) (CC and) (RB then) (S (NP (NNP Sweeney)) (VP (VBD passed) (PP (IN on) (NP (NP (DT some)) (PP (IN of) (NP (NP (DT the) (NN seat) (NNS numbers)) (PP (IN of) (NP (NP (DT those)) (SBAR (WHNP (WP who)) (S (VP (VBD had) (VP (VBN gained) (NP (JJ unauthorized) (NN access)) (PP (TO to) (NP (DT the) (NN cockpit))))))))))))))) (. .)))
The American did not find out who was behind the hijacking.
( ( The American ) ( ( ( did not ) ( ( find out ) ( who ( was ( behind ( the hijacking ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNP American)) (VP (VBD did) (RB not) (VP (VB find) (PRT (RP out)) (SBAR (WHNP (WP who)) (S (VP (VBD was) (PP (IN behind) (NP (DT the) (NN hijacking)))))))) (. .)))