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The model will represent the language proficiency of the user and is designed to be referenced during both writing analysis and feedback production .
 used for: model, writing analysis; used for: model, feedback production; conjunction: writing analysis, feedback production
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:  model, writing analysis; model, feedback production; writing analysis, feedback production 
Answer:
 used for: model, writing analysis; used for: model, feedback production; conjunction: writing analysis, feedback production