Question: In which state is Gold Mountain Casino and WinStar World Casino both located?

Context paragraphs:
Gold Mountain Manor: Gold Mountain Manor is a rustic hotel, bed & breakfast, and wedding venue on the north shore of Big Bear City, California.  Built in 1928 by Los Angeles movie investor Alexander Buchanan Barret and his wife, Bessie, Gold Mountain Manor is currently owned and managed by Cathy Weil.

WinStar World Casino: WinStar World Casino and Resort is a hotel and casino located near the Oklahoma–Texas state line, 1 mi north of the Red River, at Exit 1 off Interstate 35 and Winstar Boulevard in Thackerville, Oklahoma.  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.  In August 2013, WinStar Resorts completed a major expansion project, which added a new 1000-room second hotel tower that was divided into two phases; this also added a new casino that is attached to the tower.  As a result of the completion of this expansion, the casino overtook Foxwoods Resort Casino to become the largest casino in the United States based on gaming floor space.  WinStar has over 7,400 electronic games, 46 table poker rooms, 99 total table games, Racer's off-track betting, High Limit Room, keno, and bingo.

Gold Mountain Casino: Gold Mountain Casino is a Native American casino in Ardmore, Oklahoma, owned and operated by the Chickasaw Nation.  Originally opened in 2002 as Ardmore Gaming, the facility has grown steadily and today features more than 300 gaming machines.  The casino is open 24 hours a day, seven days a week.  The 8620 sqft casino is located on the corner of P Street N.E. and Sam Noble Parkway, and can be accessed via Interstate 35, exit 33.  It is a short distance from the Ardmore Convention Center and the Hardy Murphy Coliseum.  Gold Mountain is about 34 miles north of WinStar World Casino in Thackerville, Oklahoma, and 77 miles south of Riverwind Casino in Norman, Oklahoma, which are also Chickasaw-owned gaming facilities.

Spirit Mountain Casino (Oregon): Spirit Mountain Casino is a Native American casino located in Grand Ronde, Oregon, United States on Oregon Route 18.  It is operated by the Confederated Tribes of the Grand Ronde Community of Oregon, and was created to "enhance economic self-sufficiency opportunities for the Confederated Tribes of Grand Ronde, its members and surrounding communities; to promote economic diversification by the Tribes: to support a variety of housing, educational and cultural programs under the direction of Tribal Council".  It is the state's busiest , drawing three million visitors a year.

On Gold Mountain: On Gold Mountain: The One-Hundred-Year Odyssey of My Chinese-American Family describes 100 years of author Lisa See’s family history, providing a complex portrait of her family’s hard work, suffering, failures and successes as they moved from China to the United States.  Speaking of the Chinese side of her family, See has said: "Things were so fractured and wild at home ... But the weekends with my grandparents became the real center for me ... It was the side of the family I identified more with.  It was fun, romantic, solid".  The book has inspired both an opera, and a museum exhibition.  It also provides helpful context for See's novel, "Shanghai Girls".  The time frame for "Shanghai Girls" is 1937-1957, corresponding to Parts IV and V of "On Gold Mountain."

Chisholm Trail Casino: Chisholm Trail Casino is a casino that opened in Duncan, Oklahoma in October, 2004.  The 22,000 sqft casino is owned and operated by the Chickasaw Nation and is open 24 hours daily.  Located along the site of the historic Chisholm Trail cattle drive, the casino is five miles north of downtown Duncan on Highway 81, south of Highway 7.  Chisholm Trail is owned and operated by the Chickasaw Nation.  The casino is 70 miles south of Norman, Oklahoma, and the Nation’s sister gaming facility, Riverwind Casino.  Chisholm Trail is 100 miles northwest of WinStar World Casino, another Chickasaw Nation gaming center, located in Thackerville, Oklahoma.

Blue Hills (Washington): The Blue Hills just west of Bremerton, Washington, also called the Bremerton Hills, Bald Hills, and Wildcat Hills, consist of Gold Mountain, Green Mountain, and several informally named hills.  Reaching an elevation of 1761 feet (537 meters), a thousand feet above the glacial till that fills the Puget Lowland, they form a prominent landmark visible around the region.  They are formed of uplifted blocks of marine basalts, the steep-walled canyons between the various summits being the fissures between the blocks (particularly prominent at Gold Creek and Union River).  In addition to Gold Mountain and Green Mountain (the named members of the Blue Hills ) are several other prominent peaks unofficially named according to their elevation (in feet):

Gold Mountain, California: Gold Mountain is a census-designated place in Plumas County, California.  Gold Mountain sits at an elevation of 5341 ft .  The 2010 United States census reported Gold Mountain's population was 80.

2011 WinStar World Casino 350K: The 2011 WinStar World Casino 350K was a NASCAR Camping World Truck Series event held on November 4, 2011 at the Texas Motor Speedway in Fort Worth, Texas.  Contested over 148

Jinshan District: Jinshan District, is a suburban district of southwestern Shanghai, neighboring Zhejiang province and Hangzhou Bay.  It has a land area of 586.14 km2 and a population of 732,500 as of the 2010 Chinese census.  Jinshan District, located in the southwest of Shanghai, is one of the biggest districts of the city.  Local political administration is divided into nine towns and one subdistrict.  About 6.2 km off the coast of Jinshan, there are three islands named Da Jinshan ("Big Gold Mountain"), Xiao Jinshan ("Little Gold Mountain"), and Fushan ("Floating Mountain").  At 103 m above sea level, the peak of Dajinshan Island is the highest point within the Shanghai municipality.  There are several beaches along the 23.3 km shoreline, which are popular tourism destinations.

Supporting paragraphs: Gold Mountain Casino WinStar World Casino
Answer: Oklahoma