The Chinese calendar was used to calculate the year of Japan's foundation by counting back the 1,260 years of the Chinese cosmological cycle.
( ( The ( Chinese calendar ) ) ( ( was ( used ( to ( ( calculate ( ( the year ) ( of ( ( Japan 's ) foundation ) ) ) ) ( by ( ( counting back ) ( ( the ( 1,260 years ) ) ( of ( the ( Chinese ( cosmological cycle ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (JJ Chinese) (NN calendar)) (VP (VBD was) (VP (VBN used) (S (VP (TO to) (VP (VB calculate) (NP (NP (DT the) (NN year)) (PP (IN of) (NP (NP (NNP Japan) (POS 's)) (NN foundation)))) (PP (IN by) (S (VP (VBG counting) (PRT (RP back)) (NP (NP (DT the) (CD 1,260) (NNS years)) (PP (IN of) (NP (DT the) (JJ Chinese) (JJ cosmological) (NN cycle)))))))))))) (. .)))
The calculation of Japan's year of foundation was very exact.
( ( ( The calculation ) ( of ( ( ( Japan 's ) year ) ( of foundation ) ) ) ) ( ( was ( very exact ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN calculation)) (PP (IN of) (NP (NP (NP (NNP Japan) (POS 's)) (NN year)) (PP (IN of) (NP (NN foundation)))))) (VP (VBD was) (ADJP (RB very) (JJ exact))) (. .)))