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Traditional machine learning techniques have been applied to this problem with reasonable success , but they have been shown to work well only when there is a good match between the training and test data with respect to topic .
 machine learning techniques, problem
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:
 machine learning techniques, problem