text1: Lydians and Persians
feat_premise_binary_parse: ( ( Lydians and ) Persians )
feat_premise_parse: (ROOT (NP (NNPS Lydians) (CC and) (NNPS Persians)))
text2: Persians and Lydians did not exist.
feat_hypothesis_binary_parse: ( ( ( Persians and ) Lydians ) ( ( ( did not ) exist ) . ) )
feat_hypothesis_parse: (ROOT (S (NP (NNS Persians) (CC and) (NNS Lydians)) (VP (VBD did) (RB not) (VP (VB exist))) (. .)))