text1: I'm confused.
feat_premise_binary_parse: ( I ( ( 'm confused ) . ) )
feat_premise_parse: (ROOT (S (NP (PRP I)) (VP (VBP 'm) (ADJP (VBN confused))) (. .)))
text2: I don't understand.  
feat_hypothesis_binary_parse: ( I ( ( ( do n't ) understand ) . ) )
feat_hypothesis_parse: (ROOT (S (NP (PRP I)) (VP (VBP do) (RB n't) (VP (VB understand))) (. .)))