( -LRB- ( ( ( ( ( Because ( ( the moon ) ( ( makes ( ( one rotation ) ( on ( its axis ) ) ) ) ( in ( ( the ( same length ) ) ( of time ) ) ) ) ) ) ( it ( takes ( for ( ( for ( it ( to ( make ( ( one revolution ) ( around ( the earth ) ) ) ) ) ) ) ( , ( we ( only ( ( see ( ( one face ) ( of it ) ) ) ( - ( hence ( ( `` ( the ( dark side ) ) ) ( of ( the moon ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) '' ) -RRB- ) )
(ROOT (PRN (-LRB- -LRB-) (SBAR (S (SBAR (IN Because) (S (NP (DT the) (NN moon)) (VP (VBZ makes) (NP (NP (CD one) (NN rotation)) (PP (IN on) (NP (PRP$ its) (NNS axis)))) (PP (IN in) (NP (NP (DT the) (JJ same) (NN length)) (PP (IN of) (NP (NN time)))))))) (NP (PRP it)) (VP (VBZ takes) (SBAR (IN for) (S (SBAR (IN for) (S (NP (PRP it)) (VP (TO to) (VP (VB make) (NP (NP (CD one) (NN revolution)) (PP (IN around) (NP (DT the) (NN earth)))))))) (, ,) (NP (PRP we)) (ADVP (RB only)) (VP (VBP see) (NP (NP (CD one) (NN face)) (PP (IN of) (NP (PRP it)))) (FRAG (: -) (ADVP (RB hence)) (NP (NP (`` ``) (DT the) (JJ dark) (NN side)) (PP (IN of) (NP (DT the) (NN moon)))))))))) (. .) ('' '')) (-RRB- -RRB-)))
(Because the moon makes one rotation on its axis in the same length of time it takes for for it to make one revolution around the earth, we only see one face of it - hence "the dark side of the moon.")
(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)))))) (. .)))