 Complete the following phrase:  It was performed at the close of the 2010 Olympic ceremony in Vancouver, conducted live by Valery Gergiev, to present the 2014 Winter Olympics, which were held in Sochi, Russia. At the 2014 opening ceremony in Sochi, the theme was used again during a scene depicting national industrialization and the collectivization of agriculture in the Soviet Union. The dancers wore red and black costumes while they interacted with huge figurative tractors, giant ditch-diggers, gears, and similar engine parts. The Russian rhythmic gymnastics team used the Overture in their 