( This ( ( means ( that ( it ( takes ( ( 24 hours ) ( for ( the ( Earth ( to ( ( ( spin , ) or ) ( ( ( rotate , ) completely ) ( around ( one time ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ means) (SBAR (IN that) (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 (VP (VB spin)) (, ,) (CC or) (VP (VB rotate) (, ,) (ADVP (RB completely)) (PP (IN around) (NP (CD one) (NN time)))))))))))))) (. .)))
This means that it takes 24 hours for the Earth to spin, or rotate, completely around one time.
(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))))))))))) (. .)))