'Not entirely,' I snapped, harsher than intended.
( ` ( ( Not entirely ) ( , ( ' ( I ( ( ( snapped , ) ( harsher ( than intended ) ) ) . ) ) ) ) ) )
(ROOT (S (`` `) (FRAG (RB Not) (ADVP (RB entirely))) (, ,) ('' ') (NP (PRP I)) (VP (VBD snapped) (, ,) (S (ADJP (JJR harsher) (SBAR (IN than) (S (VP (VBD intended))))))) (. .)))
I spoke more harshly than I wanted to. 
( I ( ( ( ( spoke more ) harshly ) ( than ( I ( wanted to ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD spoke) (NP (JJR more)) (ADVP (RB harshly)) (SBAR (IN than) (S (NP (PRP I)) (VP (VBD wanted) (PP (TO to)))))) (. .)))