At 9:37:46, American Airlines Flight 77 crashed into the Pentagon, traveling at approximately 530 miles per hour.
( ( At 9:37:46 ) ( , ( ( American ( Airlines ( Flight 77 ) ) ) ( ( ( ( crashed ( into ( the Pentagon ) ) ) , ) ( traveling ( at ( ( ( approximately 530 ) miles ) ( per hour ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN At) (NP (CD 9:37:46))) (, ,) (NP (NNP American) (NNP Airlines) (NNP Flight) (CD 77)) (VP (VBD crashed) (PP (IN into) (NP (DT the) (NNP Pentagon))) (, ,) (S (VP (VBG traveling) (PP (IN at) (NP (NP (QP (RB approximately) (CD 530)) (NNS miles)) (PP (IN per) (NP (NN hour)))))))) (. .)))
American Airlines Flight 77 hit the pentagon traveling at 535 miles per hour.
( ( American ( Airlines ( Flight 77 ) ) ) ( ( hit ( ( the pentagon ) ( traveling ( at ( ( 535 miles ) ( per hour ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP American) (NNP Airlines) (NNP Flight) (CD 77)) (VP (VBD hit) (NP (NP (DT the) (NN pentagon)) (VP (VBG traveling) (PP (IN at) (NP (NP (CD 535) (NNS miles)) (PP (IN per) (NP (NN hour)))))))) (. .)))