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 "Natalia Vorobieva"): Vorobieva reached the finals in the 72 kg category where she beat Stanka Zlateva of Bulgaria to win the gold medal.
Relevant evidence: No