( Science ( ( is ( ( a subject ) ( in ( ( ( constant motion ) and ) ( constant change ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Science)) (VP (VBZ is) (NP (NP (DT a) (NN subject)) (PP (IN in) (NP (NP (JJ constant) (NN motion)) (CC and) (NP (JJ constant) (NN change)))))) (. .)))
Science is a subject in constant motion and constant change.
(ROOT (S (PP (IN In) (NP (NN science))) (, ,) (NP (NN motion)) (VP (VBZ is) (VP (VBN defined) (PP (IN as) (NP (NP (DT a) (NN change)) (PP (IN in) (NP (NN position))))))) (. .)))