( ( ( One ( complete year ) ) ( of ( the calendar ) ) ) ( ( ( matched ( ( one ( complete revolution ) ) ( of ( the Earth ) ) ) ) ( around ( the sun ) ) ) . ) )
(ROOT (S (NP (NP (CD One) (JJ complete) (NN year)) (PP (IN of) (NP (DT the) (NN calendar)))) (VP (VBD matched) (NP (NP (CD one) (JJ complete) (NN revolution)) (PP (IN of) (NP (DT the) (NN Earth)))) (PP (IN around) (NP (DT the) (NN sun)))) (. .)))
One complete year of the calendar matched one complete revolution of the Earth around the sun.
(ROOT (S (NP (NNP Earth)) (VP (VBZ makes) (NP (DT a) (JJ complete) (NN revolution)) (NP (ADVP (IN around) (NP (DT the) (NN sun)) (PP (IN about) (ADVP (RB once)))) (DT every) (NN year))) (. .)))