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We describe a set of supervised machine learning experiments centering on the construction of statistical models of WH-questions .
 supervised machine learning, statistical models of WH-questions
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:
 supervised machine learning, statistical models of WH-questions