UFC Fight Night: Namajunas vs. VanZant was held in what county?
UFC Fight Night: Namajunas vs. VanZant: UFC Fight Night: Namajunas vs. VanZant (also known as UFC Fight Night 80) was a mixed martial arts event held on December 10, 2015, at The Chelsea at The Cosmopolitan in Las Vegas, Nevada.
i don't know