The Palazzo is part of a larger complex, comprizing the Venetian Resort and Casino and a large convention center that was the second largest convention in the world when it opened in what year?
The Palazzo:  The hotel and casino are part of a larger complex (operated as one hotel) comprising the adjoining Venetian Resort and Casino and the Sands Convention Center, all of which are owned and operated by the Las Vegas Sands Corporation. Sands Expo: The Sands Expo and Convention Center is a large convention center.
i don't know