text1: Then he is very sure. 
feat_premise_binary_parse: ( Then ( he ( ( is ( very sure ) ) . ) ) )
feat_premise_parse: (ROOT (S (RB Then) (NP (PRP he)) (VP (VBZ is) (ADJP (RB very) (JJ sure))) (. .)))
text2: He is not at all sure.
feat_hypothesis_binary_parse: ( He ( ( ( is not ) ( ( at all ) sure ) ) . ) )
feat_hypothesis_parse: (ROOT (S (NP (PRP He)) (VP (VBZ is) (RB not) (ADJP (ADVP (IN at) (DT all)) (JJ sure))) (. .)))