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To incorporate the trigger words whose effectiveness have been experimentally evaluated in several previous works , we propose a novel architecture with an attention mechanism .
 used for: architecture, trigger words; feature of: attention mechanism, architecture
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:  architecture, trigger words; attention mechanism, architecture 
Answer:
 used for: architecture, trigger words; feature of: attention mechanism, architecture