( It ( ( shows ( ( ( the ( three stages ) ) ( from puppyhood ) ) ( to ( adulthood ( in ( ( a ( greyhound 's ) ) life ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ shows) (S (NP (NP (DT the) (CD three) (NNS stages)) (PP (IN from) (NP (NN puppyhood)))) (VP (TO to) (VP (VB adulthood) (PP (IN in) (NP (NP (DT a) (NN greyhound) (POS 's)) (NN life))))))) (. .)))
It shows the three stages from puppyhood to adulthood in a greyhound's life.
(ROOT (S (NP (NNP Adulthood)) (VP (VBZ is) (VP (VBN divided) (PP (IN into) (NP (CD three) (NNS stages))))) (. .)))