( ( ( The ( earth 's ) ) rotation ) ( ( is ( 24 hours ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN earth) (POS 's)) (NN rotation)) (VP (VBZ is) (NP (CD 24) (NNS hours))) (. .)))
The earth's rotation is 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))))))))))) (. .)))