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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 .
 model, writing analysis; model, feedback production; writing analysis, feedback production
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
Answer:
 model, writing analysis; model, feedback production; writing analysis, feedback production