( Motion ( ( is ( ( the ( ( action or ) process ) ) ( of ( changing position ) ) ) ) . ) )
(ROOT (S (NP (NNP Motion)) (VP (VBZ is) (NP (NP (DT the) (NN action) (CC or) (NN process)) (PP (IN of) (NP (VBG changing) (NN position))))) (. .)))
Motion is the action or process of changing position.
(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))))))) (. .)))