( Uranus ( ( ( revolves ( around ( the Sun ) ) ) ( once ( every ( 84 ( Earth years ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Uranus)) (VP (VBZ revolves) (PP (IN around) (NP (DT the) (NNP Sun))) (PP (RB once) (NP (DT every) (CD 84) (NNP Earth) (NNS years)))) (. .)))
Uranus revolves around the Sun once every 84 Earth years.
(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))) (. .)))