( ( ( ( ( A day ) , ) ( ( the time ) ( it ( takes ( for ( the ( Earth ( to ( rotate completely ) ) ) ) ) ) ) ) ) , ) ( ( takes ( 24 hours ) ) . ) )
(ROOT (S (NP (NP (DT A) (NN day)) (, ,) (NP (NP (DT the) (NN time)) (SBAR (S (NP (PRP it)) (VP (VBZ takes) (PP (IN for) (NP (DT the) (NN Earth) (S (VP (TO to) (VP (VB rotate) (ADVP (RB completely))))))))))) (, ,)) (VP (VBZ takes) (NP (CD 24) (NNS hours))) (. .)))
A day, the time it takes for the Earth to rotate completely, 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))))))))))) (. .)))