At 9:34, the Command Center relayed the information concerning United 93 to FAA headquarters.
( ( At 9:34 ) ( , ( ( the ( Command Center ) ) ( ( relayed ( ( the information ) ( concerning ( ( United 93 ) ( to ( FAA headquarters ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN At) (NP (CD 9:34))) (, ,) (NP (DT the) (NNP Command) (NNP Center)) (VP (VBD relayed) (NP (NP (DT the) (NN information)) (PP (VBG concerning) (NP (NP (NNP United) (CD 93)) (PP (TO to) (NP (NNP FAA) (NNS headquarters))))))) (. .)))
 the Command Center relayed the information concerning United 93 to NASA headquarters
( ( the ( Command Center ) ) ( relayed ( ( the information ) ( concerning ( ( United 93 ) ( to ( NASA headquarters ) ) ) ) ) ) )
(ROOT (S (NP (DT the) (NNP Command) (NNP Center)) (VP (VBD relayed) (NP (NP (DT the) (NN information)) (PP (VBG concerning) (NP (NP (NNP United) (CD 93)) (PP (TO to) (NP (NNP NASA) (NNS headquarters)))))))))