United 93 and the Shootdown Order On the morning of 9/11, the President and Vice President stayed in contact not by an open line of communication but through a series of calls.
( ( ( ( United 93 ) and ) ( the ( Shootdown Order ) ) ) ( ( On ( ( the morning ) ( of 9/11 ) ) ) ( , ( ( the ( President ( and ( Vice President ) ) ) ) ( ( ( stayed ( in contact ) ) ( not ( ( ( by ( ( an ( open line ) ) ( of communication ) ) ) but ) ( through ( ( a series ) ( of calls ) ) ) ) ) ) . ) ) ) ) )
(ROOT (S (NP (NP (NNP United) (CD 93)) (CC and) (NP (DT the) (NNP Shootdown) (NNP Order))) (PP (IN On) (NP (NP (DT the) (NN morning)) (PP (IN of) (NP (CD 9/11))))) (, ,) (NP (DT the) (NNP President) (CC and) (NNP Vice) (NNP President)) (VP (VBD stayed) (PP (IN in) (NP (NN contact))) (PP (RB not) (PP (IN by) (NP (NP (DT an) (JJ open) (NN line)) (PP (IN of) (NP (NN communication))))) (CC but) (PP (IN through) (NP (NP (DT a) (NN series)) (PP (IN of) (NP (NNS calls))))))) (. .)))
The President and Vice President did use an open line of communication to maintain contact with one and another on the morning of 9/11/
( ( The ( President ( and ( Vice President ) ) ) ) ( did ( ( use ( ( an ( open line ) ) ( of communication ) ) ) ( to ( maintain ( ( ( contact ( with one ) ) and ) ( another ( on ( ( the morning ) ( of ( 9/11 / ) ) ) ) ) ) ) ) ) ) )
(ROOT (S (NP (DT The) (NNP President) (CC and) (NNP Vice) (NNP President)) (VP (VBD did) (VP (VB use) (NP (NP (DT an) (JJ open) (NN line)) (PP (IN of) (NP (NN communication)))) (S (VP (TO to) (VP (VB maintain) (NP (NP (NP (NN contact)) (PP (IN with) (NP (CD one)))) (CC and) (NP (NP (DT another)) (PP (IN on) (NP (NP (DT the) (NN morning)) (PP (IN of) (NP (CD 9/11) (NNS /))))))))))))))