Question: Brian Olsen was the last WEC Champion before it was purchased by which sports promotion company?
Related documents: [0]  [DOC] Zuffa, LLC ( ) is an American sports promotion company specializing in mixed martial arts. It was founded in January 2001 in Las Vegas, Nevada, by Station Casinos executives Frank Fertitta III and Lorenzo Fertitta to be the parent entity of the Ultimate Fighting Championship (UFC) after they purchased it from the Semaphore Entertainment Group. The word "Zuffa" is an Italian word (] ), meaning "fight". On July 11, 2016, Zuffa announced that it would be purchased by WME-IMG for the price of $4 billion. [END] 
[1]  [DOC] Brian Olsen (born 1975) is an American former mixed martial artist who fought mainly in World Extreme Cagefighting. He was the last WEC Heavyweight Champion before it was abolished when Zuffa purchased the organization. [END] 
Answer: 
Zuffa, LLC
Zuffa, LLC