Task: Explanation
Input (English): UFC 191: Johnson vs. Dodson 2 was a mixed martial arts event held on September 5, 2015, at the MGM Grand Garden Arena in Las Vegas, Nevada. Question: What was the venue where UFC 191 was held originally called? Answer: MGM Grand Garden Special Events Center
Output (English): UFC 191: Johnson vs. Dodson 2 was a mixed martial arts event held on September 5, 2015, at the MGM Grand Garden Arena in Las Vegas, Nevada.