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These methods diier from previous work in the area in two ways : the use of an action model formalism which is better suited to the needs of a re-active agent , and successful implementation of noise-handling mechanisms .
 used for: action model formalism, methods; used for: action model formalism, re-active agent; used for: noise-handling mechanisms, methods
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:
 used for: action model formalism, methods; used for: action model formalism, re-active agent; used for: noise-handling mechanisms, methods