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Table 2 

Definition of lexicographic and string-similarity features. We denote by the string pred the lexical realization of the predicate, and by the Boolean indicator rev whether arg1 is X and arg2 is Y, or vice versa. Normalized edit-distance is edit-distance divide by the sum of lengths of pred1 and pred2.

NameTypeSourceDescription
synonym binary WordNet rev1 = rev2pred1 is a synonym of pred2
loose synonym binary WordNet rev1 = rev2pred1 and pred2 are identical except for a pair of words (w1,w2) where w1 is a synonym of w2
hypernym binary WordNet rev1 = rev2pred1 is a hypernym of pred2 at distance ≤ 2. 
loose hypernym binary WordNet rev1 = rev2pred1 and pred2 are identical except for a pair of words (w1,w2) where w1 is a hypernym of w2 at distance ≤ 2. 
hyponym binary WordNet rev1 = rev2pred1 is a hyponym of pred2 at distance ≤ 2. 
loose hyponym binary WordNet rev1 = rev2pred1 and pred2 are identical except for a pair of words (w1,w2) where w1 is a hyponym of w2 at distance ≤ 2. 
co-hyponym binary WordNet rev1 = rev2pred1 is a co-hyponym of pred2 at distance ≤ 2. 
loose co-hyponym binary WordNet rev1 = rev2pred1 and pred2 are identical except for a pair of words (w1,w2) where w1 is a co-hyponym of w2 at distance ≤ 2. 
entailment binary WordNet rev1 = rev2pred1 verb-entails pred2 (distance ≤ 1). 
loose entailment binary WordNet rev1 = rev2pred1 and pred2 are identical except for a pair of words (w1,w2) where w1 verb-entails w2 (distance ≤ 1). 
stronger binary VerbOcean rev1 = rev2pred1 is stronger-than pred2
loose stronger binary VerbOcean rev1 = rev2pred1 and pred2 are identical except for a pair of words (w1,w2) where w1 is stronger-than w2
rev-stronger binary VerbOcean rev1 = rev2pred2 is stronger-than pred1
loose rev-stronger binary VerbOcean rev1 = rev2pred1 and pred2 are identical except for a pair of words (w1,w2) where w2 is stronger-than w1
CatVar binary CatVar pred1 and pred2 contain a pair of content words (w1,w2) that are either identical or derivationally-related in CatVar. 
remove word binary String rev1 = rev2 ∧ removing a single word from pred1 will result in pred2
add word binary String rev1 = rev2 ∧ adding a single word to pred1 will result in pred2
remove adj. binary String rev1 = rev2 ∧ removing a single adjective from pred1 will result in pred2
add adj. binary String rev1 = rev2 ∧ adding a single adjective to pred1 will result in pred2
Edit real String if rev1 = rev2, the normalized edit-distance between pred1 and pred2, otherwise 1. 
Reverse binary String rev1 = rev2
NameTypeSourceDescription
synonym binary WordNet rev1 = rev2pred1 is a synonym of pred2
loose synonym binary WordNet rev1 = rev2pred1 and pred2 are identical except for a pair of words (w1,w2) where w1 is a synonym of w2
hypernym binary WordNet rev1 = rev2pred1 is a hypernym of pred2 at distance ≤ 2. 
loose hypernym binary WordNet rev1 = rev2pred1 and pred2 are identical except for a pair of words (w1,w2) where w1 is a hypernym of w2 at distance ≤ 2. 
hyponym binary WordNet rev1 = rev2pred1 is a hyponym of pred2 at distance ≤ 2. 
loose hyponym binary WordNet rev1 = rev2pred1 and pred2 are identical except for a pair of words (w1,w2) where w1 is a hyponym of w2 at distance ≤ 2. 
co-hyponym binary WordNet rev1 = rev2pred1 is a co-hyponym of pred2 at distance ≤ 2. 
loose co-hyponym binary WordNet rev1 = rev2pred1 and pred2 are identical except for a pair of words (w1,w2) where w1 is a co-hyponym of w2 at distance ≤ 2. 
entailment binary WordNet rev1 = rev2pred1 verb-entails pred2 (distance ≤ 1). 
loose entailment binary WordNet rev1 = rev2pred1 and pred2 are identical except for a pair of words (w1,w2) where w1 verb-entails w2 (distance ≤ 1). 
stronger binary VerbOcean rev1 = rev2pred1 is stronger-than pred2
loose stronger binary VerbOcean rev1 = rev2pred1 and pred2 are identical except for a pair of words (w1,w2) where w1 is stronger-than w2
rev-stronger binary VerbOcean rev1 = rev2pred2 is stronger-than pred1
loose rev-stronger binary VerbOcean rev1 = rev2pred1 and pred2 are identical except for a pair of words (w1,w2) where w2 is stronger-than w1
CatVar binary CatVar pred1 and pred2 contain a pair of content words (w1,w2) that are either identical or derivationally-related in CatVar. 
remove word binary String rev1 = rev2 ∧ removing a single word from pred1 will result in pred2
add word binary String rev1 = rev2 ∧ adding a single word to pred1 will result in pred2
remove adj. binary String rev1 = rev2 ∧ removing a single adjective from pred1 will result in pred2
add adj. binary String rev1 = rev2 ∧ adding a single adjective to pred1 will result in pred2
Edit real String if rev1 = rev2, the normalized edit-distance between pred1 and pred2, otherwise 1. 
Reverse binary String rev1 = rev2
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