Question: In what year was the original park, Six Flags, sold?
About the article "Six Flags", section "Growth and acquisitions".

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Six Flags began using the Hurricane Harbor brand in 1995 with the opening of Six Flags Hurricane Harbor adjacent to Six Flags Magic Mountain.
That same year, Wet 'n Wild in Arlington, Texas, was purchased by Six Flags.
The waterpark operated as Wet 'n Wild — A Six Flags Park in 1995 and 1996 then was rebranded as Six Flags Hurricane Harbor in 1997.
The brand has since become a trademark of the Six Flags franchise.
In 1999, Six Flags St. Louis was the first Six Flags park to construct its own intra-park water attractions section.
As Six Flags acquired and rebranded parks in the 2000s, some existing water parks within these theme parks were later upgraded and rebranded as Hurricane Harbor.
Only one Hurricane Harbor has closed.
After Six Flags Worlds of Adventure was sold to Cedar Fair in 2004, the water park was abandoned in 2006 and most of the attractions were relocated to a new waterpark on what used to be the marine life side of the park. 
  The park was sold to Six Flags, who then merged the park with Six Flags Ohio to create Six Flags Worlds of Adventure.
The park was later sold to Cedar Fair and reverted the park to its original name Geauga Lake.  
Six Flags Over Texas is a 212-acre (86 ha) theme park located in Arlington, Texas, east of Fort Worth and about 15 miles (24 km) west of Dallas.
It was the first Six Flags Theme Park, but because of later acquisitions it is not the oldest park of the Six Flags chain.
The park opened on August 5, 1961, following just a year of construction and an initial investment of US$10 million by real estate developer Angus G. Wynne, Jr.
Since its opening, Six Flags Over Texas has consistently performed well in terms of attendance and revenue, despite its history of ever-changing owners and expansions.
The park currently has several amusement rides and attractions, bringing in thousands of visitors daily.
The park is managed, but not owned, by the Six Flags corporation, in an arrangement similar to that for Six Flags Over Georgia.
Six Flags Over Texas is owned by a group of approximately 120 limited partners—some the heirs of Angus G. Wynne.
Starting in 1991, the park was managed by Time Warner Entertainment.
In 1998, Time Warner sold its interests in the Six Flags parks to Premier Parks of Oklahoma City, which later changed its name to Six Flags Theme Parks, Inc. 
At the end of 1997, the rights to operate Kentucky Kingdom were sold to Premier Parks for $64 million.
At the time, Kentucky Kingdom was one of the main tourism attractions for Louisville, receiving more visitors than Churchill Downs.
On April 1, 1998, Premier Parks purchased Six Flags from Time Warner, and as such, on June 21, 1998, Kentucky Kingdom became known as Six Flags Kentucky Kingdom.
It became the ninth amusement park to use the Six Flags name.
In 1999, Six Flags planned to re-theme the one side of the park as "Gotham City", renaming and repainting several rides.
Later that year, the idea was shelved and the rides retained their original names despite many of them having a different coat of paint.
During the Six Flags years, Six Flags would remove rides and not replace them with any other types of rides or attractions.
Examples of this can be seen with the removal of Falling Star in 2008, The Top Elminator Dragsters which had been SBNO since 2005, and the number of other rides removed to other Six Flags parks.
In 2002, the "Twisted Sisters" roller coaster was forced to be renamed to "Twisted Twins" upon a threat of a lawsuit from the band Twisted Sister.
Before the opening of the 2007 season, Hurricane Bay was rebranded as Splashwater Kingdom.
It was called Hurricane Bay from 1992-2007 and then Splashwater Kingdom from 2007-2010.
According to current plans for the future, it will return to the name Hurricane Bay when the park reopens.
On September 21, 2009, Kentucky Kingdom confirmed that the park's main attraction Chang was being removed for the addition of Bonzai Beach, a new water park region that has a separate theme from the existing Splashwater Kingdom.
Amid a corporate bankruptcy, on February 4, 2010, Six Flags announced the park would cease operations immediately due to the rejection of an amended lease by the Kentucky State Fair Board.
This left the fair board and Six Flags to negotiate the ownership of rides and attractions.
On July 25, 2010, this dispute was settled with Six Flags receiving a ride of their choice (Road Runner Express), and $2.8 million in lease related payments owed by Six Flags were forgiven, in exchange for Six Flags' property rights which included the offices, furniture, fixtures and equipment relating to the park, as well as all intellectual property.
The Kentucky State Fair Board also used $2.35 million from Ed Hart to purchase Six Flags' stake in the park.
Six Flags added rides during its 10-year operation of the park.
These rides were Road Runner Express, Greezed Lightnin' (shuttle launch coaster), Sky Coaster, Sling Shot, Tornado (water ride), Deluge (water roller coaster) and Mega Wedgie (water bowl). 
The original park, 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.
The company continued to grow by acquiring independent parks.
Six Flags purchased AstroWorld in Houston, Texas in 1975, Great Adventure in Jackson, New Jersey in 1977 and Magic Mountain in Valencia, California in 1979.
These purchases were followed by Penn Central selling assets to Bally Manufacturing in 1982.
In 1984, the Great America theme park in Gurnee, Illinois was acquired from the Marriott hotel chain.
Also in 1984, as a result of its acquisition of Great America, Six Flags acquired the rights to Time Warner/Warner Bros.' "Looney Tunes" animated characters for use in Six Flags properties.
Bally surrendered control of the chain to Wesray Capital Corporation in a 1987 leveraged buyout.
Time Warner quickly began to gain more leverage in the company, gaining a 19.5% stake in Six Flags in 1990 and then 50% in 1991, with the remaining shares of the company being split by Blackstone Group and Wertheim Schroder & Company.
Time Warner purchased the remaining stake in Six Flags in 1993, changing the company's name from "Six Flags Corp".
to "Six Flags Theme Parks, Inc".
In 1996, Six Flags began to manage Fiesta Texas theme park in San Antonio, Texas and purchased the park from USAA in 1998.