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This tool is therefore designed to distinguish between the anaphoric occurrences of il , for which an anaphora resolution system has to look for an antecedent , and the expletive occurrences of this pronoun , for which it does not make sense to look for an antecedent .
 used for: tool, anaphoric occurrences of il; used for: anaphora resolution system, anaphoric occurrences of il
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
 Entity Pairs:  tool, anaphoric occurrences of il; anaphora resolution system, anaphoric occurrences of il 
Answer:
 used for: tool, anaphoric occurrences of il; used for: anaphora resolution system, anaphoric occurrences of il