text1: The key question may be not what Hillary knew but when she knew it.
feat_premise_binary_parse: ( ( The ( key question ) ) ( ( may ( ( be not ) ( ( ( what ( Hillary knew ) ) but ) ( when ( she ( knew it ) ) ) ) ) ) . ) )
feat_premise_parse: (ROOT (S (NP (DT The) (JJ key) (NN question)) (VP (MD may) (VP (VB be) (ADVP (RB not)) (SBAR (SBAR (WHNP (WP what)) (S (NP (NNP Hillary)) (VP (VBD knew)))) (CC but) (SBAR (WHADVP (WRB when)) (S (NP (PRP she)) (VP (VBD knew) (NP (PRP it)))))))) (. .)))
text2: We know Hillary knew it, the question is when she knew it.
feat_hypothesis_binary_parse: ( ( We ( know ( Hillary ( knew it ) ) ) ) ( , ( ( the question ) ( ( is ( when ( she ( knew it ) ) ) ) . ) ) ) )
feat_hypothesis_parse: (ROOT (S (S (NP (PRP We)) (VP (VBP know) (SBAR (S (NP (NNP Hillary)) (VP (VBD knew) (NP (PRP it))))))) (, ,) (NP (DT the) (NN question)) (VP (VBZ is) (SBAR (WHADVP (WRB when)) (S (NP (PRP she)) (VP (VBD knew) (NP (PRP it)))))) (. .)))