Question: Name the Russian mixed martial artist who currently fights in the lightweight division of the UFC and is a training partner of Natalia Vitalyevna Vorobieva, a Russian wrestler who competed in the 2012 Summer Olympics?
Sentence (from "Chris Gruetzemacher"): Gruetzemacher was the former fighter for Strikeforce and World Series of Fighting (WSOF) and he currently fights in lightweight division in the Ultimate Fighting Championship (UFC).
Relevant evidence: No