5622
A unit of Mubadala Development Co. Abu Dhabi's investment arm has also bought a 10 percent stake in  Zuffa  owner of the Ultimate Fighting Championship and  World Extreme Cagefighting  .
 None
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:   
Answer:
 NA: Zuffa, World Extreme Cagefighting