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How to obtain hierarchical relations -LRB- e.g. superordinate - hyponym relation , synonym relation -RRB- is one of the most important problems for thesaurus construction .
 hierarchical relations, thesaurus construction; superordinate - hyponym relation, hierarchical relations; superordinate - hyponym relation, synonym relation; synonym relation, hierarchical relations
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:
 hierarchical relations, thesaurus construction; superordinate - hyponym relation, hierarchical relations; superordinate - hyponym relation, synonym relation; synonym relation, hierarchical relations