While it apparently was not heard by the passengers, this announcement, like those on Flight 11 and Flight 77, was intended to deceive them.
( ( While ( it ( apparently ( ( was not ) ( heard ( by ( the passengers ) ) ) ) ) ) ) ( , ( ( ( ( ( this announcement ) , ) ( like ( those ( on ( ( ( Flight 11 ) and ) ( Flight 77 ) ) ) ) ) ) , ) ( ( was ( intended ( to ( deceive them ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN While) (S (NP (PRP it)) (ADVP (RB apparently)) (VP (VBD was) (RB not) (VP (VBN heard) (PP (IN by) (NP (DT the) (NNS passengers))))))) (, ,) (NP (NP (DT this) (NN announcement)) (, ,) (PP (IN like) (NP (NP (DT those)) (PP (IN on) (NP (NP (NNP Flight) (CD 11)) (CC and) (NP (NNP Flight) (CD 77)))))) (, ,)) (VP (VBD was) (VP (VBN intended) (S (VP (TO to) (VP (VB deceive) (NP (PRP them))))))) (. .)))
The announcement was supposed to tell the passengers they were all going to tdie.
( ( The announcement ) ( ( was ( supposed ( to ( tell ( ( the passengers ) ( they ( ( were all ) ( going ( to tdie ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN announcement)) (VP (VBD was) (VP (VBN supposed) (S (VP (TO to) (VP (VB tell) (NP (NP (DT the) (NNS passengers)) (SBAR (S (NP (PRP they)) (VP (VBD were) (RB all) (VP (VBG going) (S (VP (TO to) (VP (VB tdie)))))))))))))) (. .)))