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Our contributions include a concise , modular architecture with reversible processes of understanding and generation , an information-state model of reference , and flexible links between semantics and collaborative problem solving .
 used for: concise , modular architecture, understanding; used for: concise , modular architecture, generation; conjunction: understanding, generation
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: concise , modular architecture, understanding; used for: concise , modular architecture, generation; conjunction: understanding, generation