754
Many AI researchers have investigated useful ways of verifying and validating knowledge bases for ontologies and rules , but it is not easy to directly apply them to checking process models .
 ontologies, rules
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:
 ontologies, rules