( ( Every ( year Earth ) ) ( ( completes ( ( one revolution ) ( around ( the sun ) ) ) ) . ) )
(ROOT (S (NP (DT Every) (NN year) (NN Earth)) (VP (VBZ completes) (NP (NP (CD one) (NN revolution)) (PP (IN around) (NP (DT the) (NN sun))))) (. .)))
Every year Earth completes one revolution 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))) (. .)))