text1: Err...I don't know.
feat_premise_binary_parse: ( Err ( ... ( ( I ( ( do n't ) know ) ) . ) ) )
feat_premise_parse: (ROOT (FRAG (NP (NNP Err)) (: ...) (S (NP (PRP I)) (VP (VBP do) (RB n't) (VP (VB know)))) (. .)))
text2: I know.
feat_hypothesis_binary_parse: ( I ( know . ) )
feat_hypothesis_parse: (ROOT (S (NP (PRP I)) (VP (VBP know)) (. .)))