( It ( ( ( 's commonly ) ( believed ( that ( Venus ( once ( ( was ( ( an ( `` ( upright ( '' planet ) ) ) ) ( like Earth ) ) ) ( with ( ( its ( `` ( upper ( '' hemisphere ) ) ) ) ( initially ( rotating counter-clockwise ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ 's) (ADVP (RB commonly)) (VP (VBN believed) (SBAR (IN that) (S (NP (NNP Venus)) (ADVP (RB once)) (VP (VBD was) (NP (NP (DT an) (`` ``) (JJ upright) ('' '') (NN planet)) (PP (IN like) (NP (NNP Earth)))) (PP (IN with) (NP (NP (PRP$ its) (`` ``) (JJ upper) ('' '') (NN hemisphere)) (VP (ADVP (RB initially)) (VBN rotating) (S (ADJP (JJ counter-clockwise))))))))))) (. .)))
It's commonly believed that Venus once was an &quot;upright'' planet like Earth with its &quot;upper'' hemisphere initially rotating counter-clockwise.
(ROOT (S (NP (NNP Venus)) (VP (VBZ is) (NP (NP (DT the) (JJ only) (NN planet)) (SBAR (WHNP (WDT that)) (S (VP (VBZ rotates) (ADJP (JJ clockwise)) (SBAR (IN as) (S (VP (VBN viewed) (PP (IN from) (NP (PRP$ its) (NN north) (NN pole))))))))))) (. .)))