Question: In which year did this hotel and casino, located nearer to Gold Mountain Casino than any other casinos, open?
Sentence (from "WinStar World Casino"): The casino opened as the WinStar Casino in 2004, and was expanded (with a 395-room hotel tower) and renamed the WinStar World Casino in 2009, with its 519000 sqft of casino floor making it the largest casino in the state of Oklahoma.
Relevant evidence: Yes