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In contrast to other works that address this problem using multiple classifiers , each one specialized for a specific orientation , we propose a simple two-step approach with an estimation stage and a classification stage .
 part of: estimation stage, approach; conjunction: estimation stage, classification stage; part of: classification stage, approach
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: estimation stage, approach; conjunction: estimation stage, classification stage; part of: classification stage, approach