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In December 2006  Zuffa  acquired the northern California-based promotion World Extreme Cagefighting ( WEC ) in order to stop the  International Fight League  ( IFL ) from making a deal with Versus ( now NBC Sports Network ) .
 None
Given a phrase that describes the relationship between two words, extract the words and the lexical relationship between them. The output format should be "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} 
Answer:
 NA: Zuffa, International Fight League