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The  Ultimate Fighting Championship  ( UFC ) is a mixed martial arts ( MMA ) promotion founded in 1993 by  Art Davie  and Rorion Gracie .
 founded by: Ultimate Fighting Championship, Art Davie
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
 Entity Pairs:  Ultimate Fighting Championship, Art Davie 
Answer:
 founded by: Ultimate Fighting Championship, Art Davie