The mission crew commander explained to us that the purpose was to position the Langley fighters between the reported southbound American 11 and the nation's capital.
( ( The ( mission ( crew commander ) ) ) ( ( ( explained ( to us ) ) ( that ( ( the purpose ) ( was ( to ( ( position ( the ( Langley fighters ) ) ) ( between ( ( ( ( the ( reported southbound ) ) ( American 11 ) ) and ) ( ( the ( nation 's ) ) capital ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN mission) (NN crew) (NN commander)) (VP (VBD explained) (PP (TO to) (NP (PRP us))) (SBAR (IN that) (S (NP (DT the) (NN purpose)) (VP (VBD was) (S (VP (TO to) (VP (VB position) (NP (DT the) (NNP Langley) (NNS fighters)) (PP (IN between) (NP (NP (NP (DT the) (JJ reported) (NN southbound)) (ADJP (JJ American) (NP (CD 11)))) (CC and) (NP (NP (DT the) (NN nation) (POS 's)) (NN capital))))))))))) (. .)))
The attempt to place fighter between Washington DC and American 11 was successful.
( ( The ( attempt ( to ( place ( fighter ( between ( ( ( Washington DC ) and ) ( American 11 ) ) ) ) ) ) ) ) ( ( was successful ) . ) )
(ROOT (S (NP (DT The) (NN attempt) (S (VP (TO to) (VP (VB place) (NP (NP (NN fighter)) (PP (IN between) (NP (NP (NNP Washington) (NNP DC)) (CC and) (NP (NNP American) (CD 11))))))))) (VP (VBD was) (ADJP (JJ successful))) (. .)))