At 9:00, American Airlines Executive Vice President Gerard Arpey learned that communications had been lost with American 77.
( ( At 9:00 ) ( , ( ( American ( Airlines ( Executive ( Vice ( President ( Gerard Arpey ) ) ) ) ) ) ( ( learned ( that ( communications ( had ( been ( lost ( with ( American 77 ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN At) (NP (CD 9:00))) (, ,) (NP (NNP American) (NNP Airlines) (NNP Executive) (NNP Vice) (NNP President) (NNP Gerard) (NNP Arpey)) (VP (VBD learned) (SBAR (IN that) (S (NP (NNS communications)) (VP (VBD had) (VP (VBN been) (VP (VBN lost) (PP (IN with) (NP (NNP American) (CD 77))))))))) (. .)))
At 9:00 Gerard Arpey was notified that American 77 could not be reached.
( ( At 9:00 ) ( ( Gerard Arpey ) ( ( was ( notified ( that ( ( American 77 ) ( ( could not ) ( be reached ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN At) (NP (CD 9:00))) (NP (NNP Gerard) (NNP Arpey)) (VP (VBD was) (VP (VBN notified) (SBAR (IN that) (S (NP (NNP American) (CD 77)) (VP (MD could) (RB not) (VP (VB be) (VP (VBN reached)))))))) (. .)))