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 to United 93 at 9:24
( Ballinger ( 's ( ( warning ( to ( United 93 ) ) ) ( at 9:24 ) ) ) )
(ROOT (S (NP (NNP Ballinger)) (VP (VBZ 's) (VP (VBG warning) (PP (TO to) (NP (NNP United) (CD 93))) (PP (IN at) (NP (CD 9:24)))))))