Question: What county is Six Flags Magic Mountain located in?

full_context: Document 1: Compton, California: Compton is a city in southern Los Angeles County, California, United States, situated south of downtown Los Angeles. Compton is one of the oldest cities in the county and on May 11, 1888, was the eighth city to incorporate. As of the 2010 United States Census, the city had a total population of 96,456. It is known as the "Hub City" due to its geographic centrality in Los Angeles County. Neighborhoods in Compton include Sunny Cove, Leland, Downtown Compton, and Richland Farms. The city is generally a working class city with some middle-class neighborhoods, and is home to a relatively young population, at an average 25 years of age, compared to the American median age of 38 (based on 2018 data).
Document 2: Knott's Berry Farm: In 1968, for the first time, an admission price was required to get into the park, originally set at 25 cents. The Calico log ride was added in 1969. The park became a popular destination for conservative college students in the 1960s, especially as conservative organizations like the California Free Enterprise Association, the Libres Foundation, and the Americanism Educational League were based there. According to Assistant Professor Caroline Rolland - Diamond of the Paris West University Nanterre La Défense:
Document 3: Santa Monica, California: Santa Monica is a beachfront city in western Los Angeles County, California, United States. The city is named after the Christian saint, Monica. Situated on Santa Monica Bay, it is bordered on three sides by the city of Los Angeles – Pacific Palisades to the north, Brentwood on the northeast, Sawtelle on the east, Mar Vista on the southeast, and Venice on the south. Santa Monica is well known for its affluent single-family neighborhoods but also has many neighborhoods consisting primarily of condominiums and apartments. Over two-thirds of Santa Monica's residents are renters. The Census Bureau population for Santa Monica in 2010 was 89,736.
Document 4: Golden Valley High School (Santa Clarita, California): Golden Valley High School is a high school in the William S. Hart Union High School District in the community of Canyon Country, California located in Santa Clarita, California. The school first opened in 2004 with a new campus. The student population is approximately 2500 in grades 9 through 12. The first class graduated in 2007.
Document 5: National Lampoon's Vacation: In the film, the Walley World theme park is represented by Santa Anita Park in Arcadia, California and Six Flags Magic Mountain in Valencia, California. Santa Anita Park's large parking lot and blue - tinged fascia served as the exterior of Walley World, while all park interior scenes were shot at Magic Mountain. The two roller coasters seen in the film are The New Revolution, which can be recognized by the vertical loop, and Colossus, the double - track wooden roller coaster.
Document 6: Southern California: Within southern California are two major cities, Los Angeles and San Diego, as well as three of the country's largest metropolitan areas. With a population of 3,792,621, Los Angeles is the most populous city in California and the second most populous in the United States. To the south and with a population of 1,307,402 is San Diego, the second most populous city in the state and the eighth most populous in the nation.
Document 7: Southern California: Southern California includes the heavily built-up urban area stretching along the Pacific coast from Ventura, through the Greater Los Angeles Area and the Inland Empire, and down to Greater San Diego. Southern California's population encompasses seven metropolitan areas, or MSAs: the Los Angeles metropolitan area, consisting of Los Angeles and Orange counties; the Inland Empire, consisting of Riverside and San Bernardino counties; the San Diego metropolitan area; the Oxnard–Thousand Oaks–Ventura metropolitan area; the Santa Barbara metro area; the San Luis Obispo metropolitan area; and the El Centro area. Out of these, three are heavy populated areas: the Los Angeles area with over 12 million inhabitants, the Riverside-San Bernardino area with over four million inhabitants, and the San Diego area with over 3 million inhabitants. For CSA metropolitan purposes, the five counties of Los Angeles, Orange, Riverside, San Bernardino, and Ventura are all combined to make up the Greater Los Angeles Area with over 17.5 million people. With over 22 million people, southern California contains roughly 60 percent of California's population.
Document 8: Six Flags Magic Mountain: Six Flags Magic Mountain is a theme park located in the Santa Clarita, California, neighborhood of Valencia, northwest of downtown Los Angeles. It opened on May 30, 1971, as Magic Mountain, a development of the Newhall Land and Farming Company. In 1979, Six Flags purchased the park and added the name "Six Flags" to the park's title.
Document 9: Six Flags: The original park, Six Flags Over Texas in Arlington (between Dallas and Fort Worth) was sold in 1966 to a subsidiary of the Pennsylvania Railroad, which was actively pursuing non-railroad investments in an effort to diversify its sources of income. (In 1968, the Pennsylvania Railroad merged with the New York Central Railroad to form Penn Central Corp.) With the new owners came a more abundant supply of capital for geographic expansion and park additions. Six Flags opened Six Flags Over Georgia in 1967 and Six Flags Over Mid-America in 1971, which would, along with Six Flags Over Texas, be the only three parks that would be constructed by the company.
Document 10: Full Throttle (roller coaster): Full Throttle is a steel launched roller coaster at the Six Flags Magic Mountain amusement park in Valencia, California. The ride is designed by Premier Rides and featured the world's tallest vertical loop at 160 feet (49 m) when it opened (this record is now held by Flash, a steel roller coaster at Lewa Adventure, China). It is also the first roller coaster to feature a top - hat element on a loop. It officially opened to the public on June 22, 2013.
Document 11: Santa Susana Pass State Historic Park: Santa Susana Pass State Historic Park is a California State Park of approximately located on the boundary between Ventura and Los Angeles counties, between the communities of Chatsworth and Simi Valley. Geologically, the park is located where the Simi Hills meet the Santa Susana Mountains. Here in the western part of the Transverse Ranges, the land is dominated by high, narrow ridges and deep canyons covered with an abundant variety of plant life. The park offers panoramic views of the rugged natural landscape as a striking contrast to the developed communities nearby. The park is also rich in archaeological, historical, and cultural significance.
Document 12: Southern California: Orange County is a rapidly developing business center that includes Downtown Santa Ana, the South Coast Metro and Newport Center districts; as well as the Irvine business centers of The Irvine Spectrum, West Irvine, and international corporations headquartered at the University of California, Irvine. West Irvine includes the Irvine Tech Center and Jamboree Business Parks.
Document 13: Santa Clarita, California: Santa Clarita, officially the City of Santa Clarita, is the third largest city in Los Angeles County, California, and the 23rd largest in the state of California. It is a suburb of Los Angeles. The city has annexed a number of unincorporated areas, contributing to the large population increase. It is located about northwest of downtown Los Angeles, and occupies most of the Santa Clarita Valley. It is a notable example of a U.S. edge city or boomburb. Santa Clarita was ranked by "Money" magazine in 2006 as 18th of the top 100 places to live.
Document 14: Orange County, California: Orange County is included in the Los Angeles - Long Beach - Anaheim, CA Metropolitan Statistical Area. Thirty - four incorporated cities are located in the county; the newest is Aliso Viejo, which was incorporated in 2001. Anaheim was the first city, incorporated in 1870, when the region was still part of neighboring Los Angeles County. Whereas most population centers in the United States tend to be identified by a major city, there is no defined urban center in Orange County. It is mostly suburban except for some traditionally urban areas at the centers of the older cities of Anaheim, Fullerton, Huntington Beach, Orange, and Santa Ana. There are several edge city - style developments such as Irvine Business Center, Newport Center, and South Coast Metro.
Document 15: Six Flags St. Louis: Six Flags St. Louis, formerly Six Flags Over Mid-America, is a theme park located in Eureka, Missouri. The park opened on June 5, 1971 and features eight themed areas as well as numerous attractions and live shows. The adjacent Hurricane Harbor water park is free with park admission. The park brands itself as ``Missouri's Coaster Capital ''.
ground_truth: Los Angeles County
sub_queries: Six Flags Magic Mountain >> location Answer: Santa Clarita
Santa Clarita >> located in the administrative territorial entity Answer: Los Angeles County