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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 .
 used for: machine learning techniques, problem
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
 Entity Pairs:  machine learning techniques, problem 
Answer:
 used for: machine learning techniques, problem