( ( ( The ( earths revolution ) ) ( about ( its ( own axis ) ) ) ) ( ( takes ( 24 hours ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ earths) (NN revolution)) (PP (IN about) (NP (PRP$ its) (JJ own) (NNS axis)))) (VP (VBZ takes) (NP (CD 24) (NNS hours))) (. .)))
The earths revolution about its own axis takes 24 hours.
(ROOT (S (NP (PRP It)) (VP (VBZ takes) (NP (NP (CD 24) (NNS hours)) (PP (IN for) (NP (DT the) (NN earth) (S (VP (TO to) (VP (VB make) (NP (NP (DT a) (JJ complete) (NN rotation)) (PP (IN of) (NP (PRP$ its) (NNS axis))))))))))) (. .)))