( ( ( ( Earth 's ) rotation ) ( on ( its axis ) ) ) ( ( makes ( ( a day ) ( at ( 24 hours ) ) ) ) . ) )
(ROOT (S (NP (NP (NP (NNP Earth) (POS 's)) (NN rotation)) (PP (IN on) (NP (PRP$ its) (NNS axis)))) (VP (VBZ makes) (NP (NP (DT a) (NN day)) (PP (IN at) (NP (CD 24) (NNS hours))))) (. .)))
Earth's rotation on its axis makes a day at 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))))))))))) (. .)))