Question: When is Irina Viner-Usmanova's husband's birthday?
Sentence (from "Irina Viner-Usmanova"): Irina Alexandrovna Viner-Usmanova (born July 30, 1948) is a Russian rhythmic gymnastics coach who is head coach of the Russian national team, president of the Russian Rhythmic Gymnastics Federation, and former vice president of the International Gymnastics Federation.
Relevant evidence: No