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The goal of this paper is to discover a set of discriminative patches which can serve as a fully unsupervised mid-level visual representation .
 used for: discriminative patches, unsupervised mid-level visual 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:  discriminative patches, unsupervised mid-level visual representation 
Answer:
 used for: discriminative patches, unsupervised mid-level visual representation