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Current approaches to object category recognition require datasets of training images to be manually prepared , with varying degrees of supervision .
 used for: approaches, object category recognition; used for: datasets, approaches
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:  approaches, object category recognition; datasets, approaches 
Answer:
 used for: approaches, object category recognition; used for: datasets, approaches