At the suggestion of the Boston Center's military liaison, NEADS contacted the FAA's Washington Center to ask about American 11.
( ( At ( ( the suggestion ) ( of ( ( the ( Boston ( Center 's ) ) ) ( military liaison ) ) ) ) ) ( , ( NEADS ( ( contacted ( ( ( the ( FAA 's ) ) ( Washington Center ) ) ( to ( ask ( about ( American 11 ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN At) (NP (NP (DT the) (NN suggestion)) (PP (IN of) (NP (NP (DT the) (NNP Boston) (NNP Center) (POS 's)) (JJ military) (NN liaison))))) (, ,) (NP (NNS NEADS)) (VP (VBD contacted) (S (NP (NP (DT the) (NNP FAA) (POS 's)) (NNP Washington) (NNP Center)) (VP (TO to) (VP (VB ask) (PP (IN about) (NP (NNP American) (CD 11))))))) (. .)))
NEADS asked about American 11 as soon as the military liaison suggested it.
( NEADS ( ( ( ( asked ( about ( American 11 ) ) ) ( as soon ) ) ( as ( ( the ( military liaison ) ) ( suggested it ) ) ) ) . ) )
(ROOT (S (NP (NNS NEADS)) (VP (VBD asked) (PP (IN about) (NP (NNP American) (CD 11))) (ADVP (RB as) (RB soon)) (SBAR (IN as) (S (NP (DT the) (JJ military) (NN liaison)) (VP (VBD suggested) (NP (PRP it)))))) (. .)))