Question: When was the Excalibur built in the large city in the southeastern part of the state where Humboldt Range is located?

full_context: Document 1: Humboldt Range: The Humboldt Range is a largely north-south running range of mountains in northwest Nevada, USA, that extend from the town of Imlay in the north to the junction with the West Humboldt Range in the south. It is bordered continuously by Interstate 80 and the Humboldt River, largely expanded in the form of the Rye Patch Reservoir in this area, on the west side and by a long and fairly broad Buena Vista Valley to the east, in a typical basin-and-range pattern. The Humboldts are ostensibly visible to travelers along Interstate 80, especially with respect to the highest point of the range, Star Peak, which with a quite nicely defined tip reaches an elevation of 9,836 feet (2,998 m), located in the center of the north range section. The midpoint of the range is in the area of Fourth of July Flat. The Humboldt Range is also noteworthy for having a famous historical town at its base on the eastern side called Unionville, which, for a brief period, was home to Samuel Clemens. Another historical site, now a ghost town, nearby is called Star City. Unlike some ranges in the vicinity, the substantial height of the Humboldts allows for a number of continuously flowing watersheds, and hiking the terrain is a somewhat noted activity.
Document 2: Granite Peak (Humboldt County, Nevada): Granite Peak is the highest mountain in both the Santa Rosa Range and Humboldt County, in Nevada, United States. It is the eighteenth-most topographically prominent peak in the state. The peak is located within the Santa Rosa Ranger District of the Humboldt-Toiyabe National Forest, about 12 miles north of the small town of Paradise Valley and 23 miles southeast of the small town of McDermitt. It is the highest mountain for over 80 miles in all directions.
Document 3: MGM Grand Las Vegas: The MGM Grand Las Vegas (formerly Marina and MGM - Marina) is a hotel and casino located on the Las Vegas Strip in Paradise, Nevada. The MGM Grand is the largest single hotel in the United States with 6,852 rooms. It is also the third - largest hotel complex in the world by number of rooms and second - largest hotel resort complex in the United States behind the combined The Venetian and The Palazzo. When it opened in 1993, the MGM Grand was the largest hotel complex in the world.
Document 4: Excalibur Hotel and Casino: Excalibur Hotel and Casino is a hotel and casino located on the Las Vegas Strip in Paradise, Nevada, in the United States. It is owned and operated by MGM Resorts International.
Document 5: South Fork Humboldt River: The South Fork of the Humboldt River has its origins in a fan-shaped group of canyons draining the western slopes of the Ruby Mountains in northeastern Nevada. These headwaters run from Ruby Dome south to King Peak, and include Echo, Box, Kleckner, North Furlong, Long, Segunda, Drown, and Rattlesnake Canyons. Streams draining these canyons exit the mountains and converge at an elevation of , near the town of Lee and within the tribal lands of the Te-Moak tribe of the South Fork Band of the Western Shoshone.
Document 6: Excalibur Hotel and Casino: Circus Circus Enterprises constructed Excalibur which opened on June 19, 1990, as the largest hotel in the world, with over 4,000 rooms, covering over 70 acres. As of 2016 it is the seventh - largest hotel (by total number of rooms) in Las Vegas, and the eleventh - largest hotel worldwide. MGM Resorts International purchased the property in 2005.
Document 7: Toquima Range: The Toquima Range is a mountain range, located primarily in Nye County with a small extension into Lander County, in Nevada, United States. Most of the range is included within the Humboldt-Toiyabe National Forest. The range reaches a maximum elevation of 11,949 feet (3,642 m) at the southern summit of Mount Jefferson. From Hickison Summit on U.S. Route 50, the range runs for approximately 71 miles (115 km) to the south-southwest. To its west are Big Smoky Valley, scenic State Route 376, and the large Toiyabe Range. To the east are remote Monitor Valley and the Monitor Range. Lying to the south of the range are U.S. Route 6 (Nevada) and the community of Tonopah, while to the north is U.S. Route 50 ("The Loneliest Highway in America"), leading to the small community of Austin.
Document 8: Southern Nevada: A major part of Southern Nevada's economy is based on tourism, including gambling. The primary drivers of the Las Vegas economy have been the confluence of tourism, gaming, and conventions which in turn feed the retail and dining industries. The city serves as world headquarters for the world's two largest Fortune 500 gaming companies, Harrah's Entertainment and MGM Mirage.
Document 9: Park MGM: The Monte Carlo Resort and Casino is a megaresort hotel and casino on the Las Vegas Strip in Paradise, Nevada, United States. The hotel, with a height of 360 ft (110 m), has 32 floors, featuring a 102,000 - square - foot (9,500 m) casino floor with 1,400 slot machines, 60 table games, and 15 poker tables. It is owned and operated by MGM Resorts International. The hotel offers 2,992 guest rooms, including 259 luxury suites. It is being converted from late 2016 to 2018 into the Park MGM, with the upper floors converted into a boutique hotel, NoMad Las Vegas.
Document 10: Roberts Mountains: The Roberts Mountains are located in central Nevada in the western United States. The mountains are found in Eureka County, east of the Simpson Park Mountains and west and southwest of the Sulphur Spring Range. The range reaches a peak at Roberts Creek Mountain at . Nevada State Route 278 passes the east margin of the range in Garden Valley and continues on about southeast to Eureka.
Document 11: Namibia: There are many lodges and reserves to accommodate eco-tourists. Sport hunting is also a large, and growing component of the Namibian economy, accounting for 14% of total tourism in the year 2000, or $19.6 million US dollars, with Namibia boasting numerous species sought after by international sport hunters. In addition, extreme sports such as sandboarding, skydiving and 4x4ing have become popular, and many cities have companies that provide tours.[citation needed] The most visited places include the capital city of Windhoek, Caprivi Strip, Fish River Canyon, Sossusvlei, the Skeleton Coast Park, Sesriem, Etosha Pan and the coastal towns of Swakopmund, Walvis Bay and Lüderitz.
Document 12: Atlantic City, New Jersey: Atlantic City is considered as the "Gambling Capital of the East Coast," and currently has eight large casinos and several smaller ones. In 2011, New Jersey's casinos employed approximately 33,000 employees, had 28.5 million visitors, made $3.3 billion in gaming revenue, and paid $278 million in taxes. They are regulated by the New Jersey Casino Control Commission and the New Jersey Division of Gaming Enforcement.
Document 13: Southern California: Southern California's economy is diverse and one of the largest in the United States. It is dominated and heavily dependent upon abundance of petroleum, as opposed to other regions where automobiles not nearly as dominant, the vast majority of transport runs on this fuel. Southern California is famous for tourism and Hollywood (film, television, and music). Other industries include software, automotive, ports, finance, tourism, biomedical, and regional logistics. The region was a leader in the housing bubble 2001–2007, and has been heavily impacted by the housing crash.
Document 14: Las Vegas: Las Vegas (/ lɑːs ˈveɪɡəs /, Spanish for ``The Meadows ''), officially the City of Las Vegas and often known simply as Vegas, is the 28th-most populated city in the United States, the most populated city in the state of Nevada, and the county seat of Clark County. The city anchors the Las Vegas Valley metropolitan area and is the largest city within the greater Mojave Desert. Las Vegas is an internationally renowned major resort city, known primarily for its gambling, shopping, fine dining, entertainment, and nightlife. The Las Vegas Valley as a whole serves as the leading financial, commercial, and cultural center for Nevada.
Document 15: Flamingo Las Vegas: The property includes a 72,299 - square - foot (6,716.8 m) casino along with 3,626 hotel rooms. The 15 - acre (6.1 ha) site's architectural theme is reminiscent of the Art Deco and Streamline Moderne style of Miami and South Beach. Staying true to its theme, the hotel includes a garden courtyard which serves as a wildlife habitat for flamingos. The hotel was the third resort to open on the Strip and remains the oldest resort on the Strip in operation today. The Flamingo has a Las Vegas Monorail station called the Flamingo & Caesars Palace station at the rear of the property. After opening in 1946, it has undergone a number of ownership changes.
ground_truth: 1990
sub_queries: In which state is Humboldt Range located? Answer: Nevada
what is the name of the large city in southeastern Nevada Answer: Las Vegas
when was the excalibur built in Las Vegas Answer: 1990