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The recognition quality is evaluated through retrieval on a database with ground truth , showing the power of the vocabulary tree approach , going as high as 1 million images .
 evaluate for: recognition quality, vocabulary tree approach; evaluate for: retrieval, recognition quality; used for: database with ground truth, retrieval
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:  recognition quality, vocabulary tree approach; retrieval, recognition quality; database with ground truth, retrieval 
Answer:
 evaluate for: recognition quality, vocabulary tree approach; evaluate for: retrieval, recognition quality; used for: database with ground truth, retrieval