Question: The Nevada Gaming Control Board assigned the name "Downtown Las Vegas Area" to the area that includes the downtown Las Vegas casinos and the Stratosphere Las Vegas, which used to be called what?
Sentence (from "Stratosphere Las Vegas"): The Stratosphere Las Vegas (formerly Vegas World) is a hotel, casino, and tower located on Las Vegas Boulevard just north of the Las Vegas Strip in Las Vegas, Nevada, United States.
Relevant evidence: Yes