Don't remember. 
( ( ( Do n't ) remember ) . )
(ROOT (S (VP (VB Do) (RB n't) (VP (VB remember))) (. .)))
Yes, I remember.
( Yes ( , ( I ( remember . ) ) ) )
(ROOT (S (INTJ (UH Yes)) (, ,) (NP (PRP I)) (VP (VBP remember)) (. .)))