Your contribution to Goodwill will mean more than you may know.
( ( ( Your contribution ) ( to Goodwill ) ) ( ( will ( mean ( more ( than ( you ( may know ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (PRP$ Your) (NN contribution)) (PP (TO to) (NP (NNP Goodwill)))) (VP (MD will) (VP (VB mean) (ADVP (ADVP (RBR more)) (SBAR (IN than) (S (NP (PRP you)) (VP (MD may) (VP (VB know)))))))) (. .)))
You will definitely understand what your contribution to Goodwill will mean. 
( You ( ( ( will definitely ) ( understand ( what ( ( ( your contribution ) ( to Goodwill ) ) ( will mean ) ) ) ) ) . ) )
(ROOT (S (NP (PRP You)) (VP (MD will) (ADVP (RB definitely)) (VP (VB understand) (SBAR (WHNP (WP what)) (S (NP (NP (PRP$ your) (NN contribution)) (PP (TO to) (NP (NNP Goodwill)))) (VP (MD will) (VP (VB mean))))))) (. .)))