text1: What changed?
feat_premise_binary_parse: ( What ( changed ? ) )
feat_premise_parse: (ROOT (SBARQ (WHNP (WP What)) (SQ (VP (VBD changed))) (. ?)))
text2: What was different?
feat_hypothesis_binary_parse: ( What ( ( was different ) ? ) )
feat_hypothesis_parse: (ROOT (SBARQ (WHNP (WP What)) (SQ (VBD was) (ADJP (JJ different))) (. ?)))