At 8:34, the Boston Center controller received a third transmission from American 11:
( ( At 8:34 ) ( , ( ( the ( Boston ( Center controller ) ) ) ( ( ( received ( a ( third transmission ) ) ) ( from ( American 11 ) ) ) : ) ) ) )
(ROOT (S (PP (IN At) (NP (CD 8:34))) (, ,) (NP (DT the) (NNP Boston) (NNP Center) (NN controller)) (VP (VBD received) (NP (DT a) (JJ third) (NN transmission)) (PP (IN from) (NP (NNP American) (CD 11)))) (: :)))
The Boston Center controller never got a third transmission from American 11 because it had crashed.
( ( The ( Boston ( Center controller ) ) ) ( never ( ( ( ( got ( a ( third transmission ) ) ) ( from ( American 11 ) ) ) ( because ( it ( had crashed ) ) ) ) . ) ) )
(ROOT (S (NP (DT The) (NNP Boston) (NNP Center) (NN controller)) (ADVP (RB never)) (VP (VBD got) (NP (DT a) (JJ third) (NN transmission)) (PP (IN from) (NP (NNP American) (CD 11))) (SBAR (IN because) (S (NP (PRP it)) (VP (VBD had) (VP (VBD crashed)))))) (. .)))