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Robust natural language interpretation requires strong semantic domain models , fail-soft recovery heuristics , and very flexible control structures .
 used for: semantic domain models, natural language interpretation; conjunction: semantic domain models, fail-soft recovery heuristics; used for: fail-soft recovery heuristics, natural language interpretation; conjunction: fail-soft recovery heuristics, control structures; used for: control structures, natural language interpretation
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: semantic domain models, natural language interpretation; conjunction: semantic domain models, fail-soft recovery heuristics; used for: fail-soft recovery heuristics, natural language interpretation; conjunction: fail-soft recovery heuristics, control structures; used for: control structures, natural language interpretation