Question: ZenQuest Martial Arts Center is affiliated with an association by a Brazilian mixed martial artist who is regarded as one of the greatest what in MMA history?
Sentence (from "Ricardo Arona"): He is the former RINGS Middleweight Champion, as well as the 2001 RINGS Middleweight Championship Tournament Winner, and 2005 PRIDE Middleweight Grand Prix Runner-Up.
Relevant evidence: No