The year of 1820 was a pivotal one in the story of the King?­dom of Hawaii.
( ( ( The year ) ( of 1820 ) ) ( ( was ( ( a ( pivotal one ) ) ( in ( ( the story ) ( of ( ( the King?dom ) ( of Hawaii ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN year)) (PP (IN of) (NP (CD 1820)))) (VP (VBD was) (NP (NP (DT a) (JJ pivotal) (NN one)) (PP (IN in) (NP (NP (DT the) (NN story)) (PP (IN of) (NP (NP (DT the) (NNP King?dom)) (PP (IN of) (NP (NNP Hawaii))))))))) (. .)))
Hawaii has improved so much since 1820.
( Hawaii ( ( has ( ( improved ( so much ) ) ( since 1820 ) ) ) . ) )
(ROOT (S (NP (NNP Hawaii)) (VP (VBZ has) (VP (VBN improved) (ADVP (RB so) (RB much)) (PP (IN since) (NP (CD 1820))))) (. .)))