At 9:24, Ballinger's warning to United 93 was received in the cockpit.
( ( At 9:24 ) ( , ( ( ( ( Ballinger 's ) warning ) ( to ( United 93 ) ) ) ( ( was ( received ( in ( the cockpit ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN At) (NP (CD 9:24))) (, ,) (NP (NP (NP (NNP Ballinger) (POS 's)) (NN warning)) (PP (TO to) (NP (NNP United) (CD 93)))) (VP (VBD was) (VP (VBN received) (PP (IN in) (NP (DT the) (NN cockpit))))) (. .)))
Ballinger's warning was never received.
( ( ( Ballinger 's ) warning ) ( ( was ( never received ) ) . ) )
(ROOT (S (NP (NP (NNP Ballinger) (POS 's)) (NN warning)) (VP (VBD was) (VP (ADVP (RB never)) (VBN received))) (. .)))