Complex sentence: Lev Alekseyevich Voronin (22 February 1928--24 June 2006) was a Soviet Russian official who became a banker following the dissolution of the Soviet Union.
Split into simpler sentences: Lev Alekseyevich Voronin (22 February 1928--24 June 2006) was a Soviet Russian official. Voronin worked as a banker following the dissolution of the Soviet Union.