( ( These changes ) ( ( slowed ( ( the pace ) ( of ( implementation ( of ( the program ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT These) (NNS changes)) (VP (VBD slowed) (NP (NP (DT the) (NN pace)) (PP (IN of) (NP (NP (NN implementation)) (PP (IN of) (NP (DT the) (NN program))))))) (. .)))
These changes slowed the pace of implementation of the program.
(ROOT (S (NP (NNP Human) (NN evolution)) (VP (VBZ shows) (SBAR (IN that) (S (NP (JJ evolutionary) (NNS changes)) (ADVP (RB typically)) (VP (VBP occur) (PP (IN at) (NP (DT a) (JJ slow) (NN pace))))))) (. .)))