World Series of Fighting 31: Ivanov vs. Copeland took place at a hotel and casino complex on what Indian reservation?
World Series of Fighting 31: Ivanov vs. Copeland: World Series of Fighting 31: Ivanov vs. Copeland was a mixed martial arts event held on  17, 2016 (2016--) at the Foxwoods Resort Casino in Mashantucket, Connecticut.
i don't know