Question: When is Irina Viner-Usmanova's husband's birthday?
Sentence (from "Alisher Usmanov"): Usmanov built his wealth through metal and mining operations, and investments, and is the majority shareholder of Metalloinvest, a Russian industrial conglomerate, which consolidated in 2006 JSC Metalloinvest's assets (the Mikhailovsky GOK and the Ural Steel) with those of Gazmetall JSC (the Lebedinsky GOK and the Oskol Electrometallurgical Plant).
Relevant evidence: No