Question: Which amusement park corporation based in the United States bought Movieland Wax Museum

Context paragraphs:
Amusement Today: Amusement Today is a monthly periodical that features articles, news, pictures and reviews about all things relating to the amusement park industry, including parks, rides, and ride manufacturers.  The trade newspaper, which is based in Arlington, Texas, United States, was founded in January 1997 by Gary Slade, Virgil E. Moore III and Rick Tidrow.  In 1997, "Amusement Today" won the Impact Award in the services category for "Best New Product" from the International Association of Amusement Parks and Attractions (IAAPA).  A year later, in 1998, the magazine founded the Golden Ticket Awards, for which it has become best known for throughout the amusement park industry.  On January 2, 2001, Slade bought out his two partners, giving him sole ownership of the paper.  The paper has two full-time and two part-time staff members at its Arlington office, along with two full-time writers and several freelance writers in various parts of the world.

Lake Compounce: Lake Compounce is an amusement park located in Bristol and Southington, Connecticut; the lake itself lies completely in Southington.  Opened in 1846, it is the oldest continuously-operating amusement park in the United States.  The amusement park covers 332 acres (1.3 km²) of land, and also has a beach and a waterpark which can be used by guests for no extra charge.  The park was acquired from Kennywood Entertainment Company by Palace Entertainment, the U.S. subsidiary of Parques Reunidos.  In addition to the title for oldest consecutively run amusement park in the United States, it also has 14th oldest wooden roller coaster in the world, Wildcat.  Its other, newer wooden roller coaster, Boulder Dash, has won the Golden Ticket Award for the #1 Wooden Coaster in the World for 5 years, and held that record from 2013 to 2016.

Movieland Wax Museum: Movieland Wax Museum, with over 300 wax figures in 150 sets, was the largest wax museum in the United States.  Located in Buena Park, California, it was for decades one of the most popular wax museums in the United States.  Allen Parkinson founded the museum on May 4, 1962, but sold it to the Six Flags Corporation in 1970.  It was located north of Knott's Berry Farm on Beach Boulevard.

Madame Tussauds Washington D.C.: Madame Tussauds Washington D.C. is a wax museum located in Washington D.C., the capital city of the United States of America.  The attraction opened in October 2007 and became the 12th Madame Tussauds venue worldwide.  and features wax sculptures of famous figures from politics, culture, sports, music and television.  In comparison to other Madame Tussauds venues, the venue features more waxworks of political figures, with sculptures of all 44 U.S. presidents displayed.

Six Flags: Six Flags, officially Six Flags Entertainment Corporation, is an amusement park corporation based in the United States, with properties in the US, Canada, and Mexico.  It is the largest amusement park company in the world, based on the number of properties owned, and is ranked sixth in terms of attendance.  The company maintains twenty properties throughout North America including theme parks, thrill parks, water parks, and family entertainment centers.  In 2016, Six Flags properties hosted over 30.1 million guests.

Lakeside Amusement Park: Lakeside Amusement Park is a family-owned amusement park in Lakeside, Colorado adjacent to Denver.  Originally named White City, it was opened in 1908 as a popular amusement resort adjacent to Lake Rhoda spearheaded by prominent Denver brewer Adolph Zang.  Eventually the name was changed to Lakeside Amusement Park, but the local populace kept referring to it by its original name for its glittering original display of over 100,000 lights.  Today it is one of the oldest amusement parks in the United States, and the oldest still running in Colorado.  The park, comprising nearly half of the Town of Lakeside that it was responsible for creating in 1907, features the landmark Tower of Jewels.

Potter's Wax Museum: The Potter's Wax Museum is located at 31 Orange Street (formerly 1 King Street from 1948 to 1986, 17 King Street from 1987 to 2013), St. Augustine, Florida, United States.  It houses over 160 wax sculptures (243 before 1986) covering a wide range of real and fictitious figures, including famous politicians, entertainers, horror characters, historical personalities, sports stars and other celebrities.  George L. Potter established the collection in 1948 and the attraction is the first wax museum in the United States.

Knoebels Amusement Resort: Knoebels Amusement Resort ( ) is a family-owned and operated amusement park, picnic grove, and campground in Elysburg, Pennsylvania.  It is and has been America's largest free-admission park for 90 years of operation.  Opened in 1926, the park has more than 60 rides, three wooden roller coasters, one steel roller coaster, a 1913 carousel, and a haunted house dark ride that was featured on the Discovery Channel.  The park and its rides have won awards from organizations such as "Amusement Today", American Coaster Enthusiasts, and the International Association of Amusement Parks and Attractions.  In 2014, Travel Channel rated Knoebels one of their Top 10 Family Friendly Amusement Parks in the United States.  America's Number One Amusement Park

Madame Tussauds Las Vegas: Madame Tussauds Las Vegas is a wax museum located in the Las Vegas Strip at The Venetian Las Vegas casino resort in Paradise, Nevada.  The attraction opened in 1999, becoming the first Madame Tussauds venue to open in the United States.  It features over 100 wax figures of famous celebrities, film and TV characters, athletes, musicians and Marvel superheroes, as well a 4D movie theatre.  Subsequent Madame Tussauds venues opened in the U.S in New York City in 2000, Washington D.C. in 2007, and Hollywood, California in 2009.

Idlewild and Soak Zone: Idlewild and Soak Zone, commonly known as Idlewild Park or simply Idlewild, is a children's amusement park situated in the Laurel Highlands near Ligonier, Pennsylvania, United States, about 50 mi east of Pittsburgh, along US Route 30.  Founded in 1878 as a campground along the Ligonier Valley Railroad by Thomas Mellon, Idlewild is the oldest amusement park in Pennsylvania and the third oldest operating amusement park in the United States behind Lake Compounce and Cedar Point.  The park has won several awards, including from industry publication "Amusement Today" as the best children's park in the world.

Supporting paragraphs: Movieland Wax Museum Six Flags
Answer: Six Flags