Question: What city does O and Cirque du Soleil play in?
Sentence (from "Cirque du Soleil: Worlds Away"): It stars Erica Linz and Igor Zaripov as the main characters and incorporates acts from some of the Cirque du Soleil shows that were running in Las Vegas in 2011 including O, Mystère, Kà, Love, and Viva Elvis.
Relevant evidence: Yes