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Sufficient dimension reduction techniques aim to find a low dimensional representation such that the remaining degrees of freedom become conditionally independent of the output values .
 used for: Sufficient dimension reduction techniques, low dimensional representation
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:  Sufficient dimension reduction techniques, low dimensional representation 
Answer:
 used for: Sufficient dimension reduction techniques, low dimensional representation