Question: The Youth in Music championship is held in the stadium that was built on the site of what former stadium?
Sentence (from "Allianz Riviera"): The Allianz Riviera (also known as the Stade de Nice due to UEFA sponsorship regulations) is a multi-use stadium in Nice, France, used mostly for football matches of host OGC Nice and also for occasional home matches of rugby union club Toulon.
Relevant evidence: No