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These models , which are built from shallow linguistic features of questions , are employed to predict target variables which represent a user 's informational goals .
 shallow linguistic features of questions, models
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:
 shallow linguistic features of questions, models