approaches to achieving missions vary considerably between agencies.
( ( approaches ( to ( achieving missions ) ) ) ( ( ( vary considerably ) ( between agencies ) ) . ) )
(ROOT (S (NP (NP (NNS approaches)) (PP (TO to) (S (VP (VBG achieving) (NP (NNS missions)))))) (VP (VBP vary) (ADVP (RB considerably)) (PP (IN between) (NP (NNS agencies)))) (. .)))
Approaches to achieving missions changes very little.
( ( Approaches ( to ( achieving missions ) ) ) ( ( changes ( very little ) ) . ) )
(ROOT (S (NP (NP (NNS Approaches)) (PP (TO to) (S (VP (VBG achieving) (NP (NNS missions)))))) (VP (VBZ changes) (ADJP (RB very) (JJ little))) (. .)))