8785
Unlike previous studies that focus on user 's knowledge or typical kinds of users , the user model we propose is more comprehensive .
 studies, user model
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:
 studies, user model