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For categorization task , positive feature vectors and negative feature vectors are used cooperatively to construct generic , indicative summaries .
 used for: positive feature vectors, categorization task; conjunction: positive feature vectors, negative feature vectors; used for: positive feature vectors, generic , indicative summaries; used for: negative feature vectors, categorization task; used for: negative feature vectors, generic , indicative summaries
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:  positive feature vectors, categorization task; positive feature vectors, negative feature vectors; positive feature vectors, generic , indicative summaries; negative feature vectors, categorization task; negative feature vectors, generic , indicative summaries 
Answer:
 used for: positive feature vectors, categorization task; conjunction: positive feature vectors, negative feature vectors; used for: positive feature vectors, generic , indicative summaries; used for: negative feature vectors, categorization task; used for: negative feature vectors, generic , indicative summaries