( ( ( ( ( It ( ( orbits ( around ( the Sun ) ) ) ( once ( every ( 12 ( earth years ) ) ) ) ) ) , ) and ) ( it ( ( ( spins ( relatively fast ) ) , ) ( about ( once ( every ( 10 hours ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (PRP It)) (VP (VBZ orbits) (PP (IN around) (NP (DT the) (NNP Sun))) (PP (RB once) (NP (DT every) (CD 12) (NN earth) (NNS years))))) (, ,) (CC and) (S (NP (PRP it)) (VP (VBZ spins) (ADJP (RB relatively) (JJ fast)) (, ,) (PP (IN about) (NP (RB once) (DT every) (CD 10) (NNS hours))))) (. .)))
It orbits around the Sun once every 12 earth years, and it spins relatively fast, about once every 10 hours.
(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))) (. .)))