The 47th Mr. Olympia competition was run by a Convention Center owned and operated by who?
2011 Mr. Olympia: The 2011 Mr. Olympia contest was an IFBB professional bodybuilding competition and the feature event of Joe Weider's Olympia Fitness & Performance Weekend 2011 held September 15–18, 2011 at the Las Vegas Convention Center and Orleans Arena in Las Vegas, Nevada. 2011 Mr. Olympia:  It was the 47th Mr. Olympia competition.
i don't know