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Basically , a set of age-group specific dictionaries are learned , where the dictionary bases corresponding to the same index yet from different dictionaries form a particular aging process pattern cross different age groups , and a linear combination of these patterns expresses a particular personalized aging process .
 part of: dictionary bases, age-group specific dictionaries; used for: linear combination, personalized aging process; used for: patterns, linear combination
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "relation1: word1, word2; relation2: word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
Answer:
 part of: dictionary bases, age-group specific dictionaries; used for: linear combination, personalized aging process; used for: patterns, linear combination