I guarantee you'll feel good knowing you've helped us touch a heart.
( I ( ( guarantee ( you ( 'll ( ( feel good ) ( knowing ( you ( 've ( helped ( us ( touch ( a heart ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP guarantee) (SBAR (S (NP (PRP you)) (VP (MD 'll) (VP (VB feel) (ADJP (JJ good)) (S (VP (VBG knowing) (SBAR (S (NP (PRP you)) (VP (VBP 've) (VP (VBN helped) (S (NP (PRP us)) (VP (VB touch) (NP (DT a) (NN heart))))))))))))))) (. .)))
I promise that you will enjoy feeling good after helping someone.
( I ( ( promise ( that ( you ( will ( enjoy ( feeling ( good ( after ( helping someone ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP promise) (SBAR (IN that) (S (NP (PRP you)) (VP (MD will) (VP (VB enjoy) (S (VP (VBG feeling) (ADJP (JJ good) (PP (IN after) (S (VP (VBG helping) (NP (NN someone))))))))))))) (. .)))