as invested with its dignity,  since the seventeenth century just as the Crown has been used for the monarch, or the Oval Office has come to stand for the President of the United States.
( ( as ( invested ( with ( its dignity ) ) ) ) ( , ( ( since ( ( ( ( ( ( the ( seventeenth century ) ) ( just ( as ( the Crown ) ) ) ) ( has ( been ( used ( for ( the monarch ) ) ) ) ) ) , ) or ) ( ( the ( Oval Office ) ) ( has ( come ( to ( stand ( for ( ( the President ) ( of ( the ( United States ) ) ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (FRAG (ADJP (RB as) (VBN invested) (PP (IN with) (NP (PRP$ its) (NN dignity)))) (, ,) (SBAR (IN since) (S (S (NP (NP (DT the) (JJ seventeenth) (NN century)) (PP (RB just) (IN as) (NP (DT the) (NNP Crown)))) (VP (VBZ has) (VP (VBN been) (VP (VBN used) (PP (IN for) (NP (DT the) (NN monarch))))))) (, ,) (CC or) (S (NP (DT the) (NNP Oval) (NNP Office)) (VP (VBZ has) (VP (VBN come) (S (VP (TO to) (VP (VB stand) (PP (IN for) (NP (NP (DT the) (NNP President)) (PP (IN of) (NP (DT the) (NNP United) (NNPS States))))))))))))) (. .)))
Americans are proud of the Oval office and the government it represents.
( Americans ( ( are ( proud ( of ( ( ( the ( Oval office ) ) and ) ( ( the government ) ( it represents ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNPS Americans)) (VP (VBP are) (ADJP (JJ proud) (PP (IN of) (NP (NP (DT the) (JJ Oval) (NN office)) (CC and) (NP (NP (DT the) (NN government)) (SBAR (S (NP (PRP it)) (VP (VBZ represents))))))))) (. .)))