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 might change a lot.
( ( Approaches ( to ( achieving missions ) ) ) ( ( might ( change ( a lot ) ) ) . ) )
(ROOT (S (NP (NP (NNS Approaches)) (PP (TO to) (S (VP (VBG achieving) (NP (NNS missions)))))) (VP (MD might) (VP (VB change) (NP (DT a) (NN lot)))) (. .)))