Question: Who granted this American Brazilian jiu-jitsu practitioner, who founded Metamoris, a black belt?
Sentence (from "Ralek Gracie"): As the son of Rorion Gracie, he is a member of the Gracie family, and the nephew of Legends of MMA Hall of Famer Rickson Gracie and UFC Hall of Famer Royce Gracie.
Relevant evidence: No