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Along the way , we present the first comprehensive comparison of unsupervised methods for part-of-speech tagging , noting that published results to date have not been comparable across corpora or lexicons .
 used for: unsupervised methods, part-of-speech tagging
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:  unsupervised methods, part-of-speech tagging 
Answer:
 used for: unsupervised methods, part-of-speech tagging