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Robust natural language interpretation requires strong semantic domain models , fail-soft recovery heuristics , and very flexible control structures .
 semantic domain models, natural language interpretation; semantic domain models, fail-soft recovery heuristics; fail-soft recovery heuristics, natural language interpretation; fail-soft recovery heuristics, control structures; control structures, natural language interpretation
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: conjunction, feature of, hyponym of, used for, part of, compare, evaluate for 
Text: {0} 
Answer:
 semantic domain models, natural language interpretation; semantic domain models, fail-soft recovery heuristics; fail-soft recovery heuristics, natural language interpretation; fail-soft recovery heuristics, control structures; control structures, natural language interpretation