( ( ( The Moon ) ( ( rotates ( on ( its axis ) ) ) ( in ( ( the ( same amount ) ) ( of time ) ) ) ) ) ( it ( ( takes ( to ( circle ( ( ( the Earth ) , ) ( which ( means ( that ( ( ( one side ) ( of ( the Moon ) ) ) ( always ( faces us ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (S (NP (DT The) (NNP Moon)) (VP (VBZ rotates) (PP (IN on) (NP (PRP$ its) (NNS axis))) (PP (IN in) (NP (NP (DT the) (JJ same) (NN amount)) (PP (IN of) (NP (NN time))))))) (NP (PRP it)) (VP (VBZ takes) (S (VP (TO to) (VP (VB circle) (NP (NP (DT the) (NN Earth)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ means) (SBAR (IN that) (S (NP (NP (CD one) (NN side)) (PP (IN of) (NP (DT the) (NNP Moon)))) (ADVP (RB always)) (VP (VBZ faces) (NP (PRP us))))))))))))) (. .)))
The Moon rotates on its axis in the same amount of time it takes to circle the Earth, which means that one side of the Moon always faces us.
(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)))))) (. .)))