American 77 traveled undetected for 36 minutes on a course heading due east for Washington, D.C.
( ( American 77 ) ( ( traveled ( undetected ( for ( 36 minutes ) ) ) ) ( on ( ( a course ) ( ( heading ( due east ) ) ( for ( Washington ( , D.C. ) ) ) ) ) ) ) )
(ROOT (S (NP (NNP American) (CD 77)) (VP (VBD traveled) (ADJP (JJ undetected) (PP (IN for) (NP (CD 36) (NNS minutes)))) (PP (IN on) (NP (NP (DT a) (NN course)) (VP (VBG heading) (ADVP (RB due) (JJ east)) (PP (IN for) (NP (NNP Washington) (, ,) (NNP D.C.)))))))))
American 77 was not known to be flying toward Washington, D.C
( ( American 77 ) ( ( was not ) ( known ( to ( be ( flying ( toward ( Washington ( , D.C ) ) ) ) ) ) ) ) )
(ROOT (S (NP (NNP American) (CD 77)) (VP (VBD was) (RB not) (VP (VBN known) (S (VP (TO to) (VP (VB be) (VP (VBG flying) (PP (IN toward) (NP (NNP Washington) (, ,) (NNP D.C)))))))))))