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 have sent you 50 letters before this follow-up letter because you refuse to answer any other letters.
( I ( ( have ( ( sent you ) ( ( ( 50 letters ) ( before ( this ( follow-up letter ) ) ) ) ( because ( you ( refuse ( to ( answer ( any ( other letters ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP have) (VP (VBN sent) (NP (PRP you)) (NP (NP (CD 50) (NNS letters)) (PP (IN before) (NP (DT this) (NN follow-up) (NN letter))) (SBAR (IN because) (S (NP (PRP you)) (VP (VBP refuse) (S (VP (TO to) (VP (VB answer) (NP (DT any) (JJ other) (NNS letters))))))))))) (. .)))