I'm sending this follow-up letter to let you know that your support is greatly needed and appreciated by everyone involved with graduate Endodontics at IU.
( I ( ( 'm ( ( sending ( this ( follow-up letter ) ) ) ( to ( let ( you ( know ( that ( ( your support ) ( ( is greatly ) ( ( ( needed and ) appreciated ) ( by ( everyone ( ( involved ( with ( graduate Endodontics ) ) ) ( at IU ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP 'm) (VP (VBG sending) (NP (DT this) (NN follow-up) (NN letter)) (S (VP (TO to) (VP (VB let) (S (NP (PRP you)) (VP (VB know) (SBAR (IN that) (S (NP (PRP$ your) (NN support)) (VP (VBZ is) (ADVP (RB greatly)) (VP (VBN needed) (CC and) (VBN appreciated) (PP (IN by) (NP (NP (NN everyone)) (VP (VBN involved) (PP (IN with) (NP (JJ graduate) (NNS Endodontics))) (PP (IN at) (NP (NNP IU))))))))))))))))) (. .)))
I am sending this letter to let you know that I have decided to move to Malta and become a buddhist monk. 
( I ( ( am ( sending ( this ( letter ( to ( let ( you ( ( ( know ( that ( I ( have ( decided ( to ( move ( to Malta ) ) ) ) ) ) ) ) and ) ( become ( a ( buddhist monk ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP am) (VP (VBG sending) (NP (DT this) (NN letter) (S (VP (TO to) (VP (VB let) (S (NP (PRP you)) (VP (VP (VB know) (SBAR (IN that) (S (NP (PRP I)) (VP (VBP have) (VP (VBN decided) (S (VP (TO to) (VP (VB move) (PP (TO to) (NP (NNP Malta))))))))))) (CC and) (VP (VB become) (NP (DT a) (JJ buddhist) (NN monk))))))))))) (. .)))