( ( Over time ) ( , ( ( ( the ( Moon 's ) ) rotation ) ( ( has ( slowed ( to ( ( the point ) ( where ( ( one rotation ) ( takes ( just ( ( ( ( ( as ( long ( as one ) ) ) orbit ) ( around Earth ) ) : ) ( 27:322 days ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN Over) (NP (NN time))) (, ,) (NP (NP (DT the) (NNP Moon) (POS 's)) (NN rotation)) (VP (VBZ has) (VP (VBN slowed) (PP (TO to) (NP (NP (DT the) (NN point)) (SBAR (WHADVP (WRB where)) (S (NP (CD one) (NN rotation)) (VP (VBZ takes) (NP (RB just) (NP (NP (QP (RB as) (JJ long) (IN as) (CD one)) (NN orbit)) (PP (IN around) (NP (NNP Earth)))) (: :) (NP (CD 27:322) (NNS days)))))))))) (. .)))
Over time, the Moon's rotation has slowed to the point where one rotation takes just as long as one orbit around Earth: 27:322 days.
(ROOT (S (NP (PRP It)) (VP (VBZ takes) (NP (NN earth) (CD one) (NN week)) (S (VP (TO to) (VP (VB rotate) (PP (IN on) (NP (PRP$ its) (NNS axis))) (NP (CD seven) (NNS times)))))) (. .)))