Question: The G. Heileman Brewing Company was acquired by Pabst Brewing Company through the purchase of what company?
Context: The Pabst Brewing Company ( ) is an American company that dates its origins to a brewing company founded in 1844 by Jacob Best and was, by 1889, named after Frederick Pabst.  It is currently the holding company contracting for the brewing of over two dozen brands of beer and malt liquor from now defunct companies including Pabst Blue Ribbon, P. Ballantine and Sons Brewing Company, G. Heileman Brewing Company, Lone Star Brewing Company, Pearl Brewing Company, Piels Bros., Valentin Blatz Brewing Company, National Brewing Company, Olympia Brewing Company, Falstaff Brewing Corporation, Primo Brewing & Malting Company, Rainier Brewing Company, F & M Schaefer Brewing Company, Joseph Schlitz Brewing Company, Jacob Schmidt Brewing Company and Stroh Brewery Company. The Pearl Brewing Company (also known as the Pearl Brewery or just Pearl) was an American brewery, established in 1883 in Downtown San Antonio, Texas, USA.  In 1985, Pearl's parent company purchased the Pabst Brewing Company and assumed the Pabst name.  In 1999, the Pabst Brewing Company began transferring its production to Miller Brewing, on a contract basis, and closing all of its breweries.  Pearl beer is still in production at Miller's Ft. Worth, Texas facility, but the Pearl Brewery in San Antonio was closed in 2001.  Since then, the former brewery was purchased by Silver Ventures, Inc., which has made the property the crown jewel in revitalization efforts of southern Midtown and northern Downtown San Antonio. Colt 45 is a brand of lager or malt liquor in the United States, introduced by National Brewing Company in the spring of 1963.  Through a series of mergers and acquisitions, the National Brewing Company and its brands (including Colt 45) are today owned by the Pabst Brewing Company. The G. Heileman Brewing Company of La Crosse, Wisconsin, United States, was a brewery firm that operated from 1858 to 1996.  It was ultimately acquired by Stroh's, and its independent existence ceased.  From 1872 until its acquisition, the brewery bore the family name of its co-founder, brewer Gottlieb Heileman. The Olympia Brewing Company was a brewery in the northwest United States, located in Tumwater, Washington, near Olympia.  Founded in 1896 by Leopold Friederich Schmidt, it was bought by G. Heileman Brewing Company in 1983.  Through a series of consolidations, it was acquired by Pabst Brewing Company in 1999; the Tumwater brewery was closed in 2003 but the Olympia brand continues, currently contract brewed by MillerCoors in southern California. Big Bear was a malt liquor distributed by the Pabst Brewing Company.  It was introduced by the Theo Hamm Brewing Company, which was purchased by Pabst.  in 1999, Pabst sold the Hamm's Brand to Miller as part of the Stroh Deal but kept the malt liquor brand.  It was discontinued in 2013.  Its alcohol content varied depending on location, from 5.7% to 7.5% abv in the United States, and 7.0% to 8.0% in Canada.  It was typically sold in 40 ounce bottles or 24 ounce cans. Primo Brewing Company is a Honolulu-based beer brewing company.  The company claims the title "Hawai’i’s original beer".  The brand is currently owned and operated by Pabst Brewing Company. Johann Gottlieb Heileman (January 6, 1824 in Kirchheim unter Teck, Württemberg – February 19, 1878 in La Crosse, Wisconsin) was the founder of the G. Heileman Brewing Company in La Crosse, Wisconsin.  Heileman founded the brewery in 1858.  His business strategy focused on producing the best local beer, rather than expanding nationwide like his company's contemporary Anheuser-Busch. The Pabst Brewery Complex in Milwaukee, Wisconsin is the former brewery of the Pabst Brewing Company.  The facility was closed in 1997.  On August 16, 2006 the brewery complex was purchased by Joseph Zilber's investment group Brewery Project LLC for $13 million to create The Brewery, a renovated complex for residential, office, and retail use.  The Pabst Brewing Company Former Corporate Office Building & Visitor's Center have been reopened as "Best Place," in reference to the brewery's founders Jacob Best and Phillip Best, and feature an antiques gift shop, Blue Ribbon Hall and the "Little Tavern on the Hill."  Enclosed by the building are two courtyards, one of which houses a statue of Captain Frederick Pabst.  A statue of King Gambrinus, the unofficial patron saint of beer, used to be displayed in the other courtyard, but was removed when the brewery was shut down in the mid-1990s.  The sculpture was loaned back to the complex by the Pabst Corporation after a lengthy negotiation period on May 21, 2011. Rainier Brewing Company (1878–1999) was a Seattle, Washington, company that brewed Rainier Beer, a popular brand in the Pacific Northwest of the United States.  Although Rainier was founded in 1884, the Seattle site had been brewing beer since 1878.  The beer is no longer brewed in Seattle, nor is the company owned locally.  In the late 1990s, the company was sold to Stroh's, then to Pabst Brewing Company, though Miller contract brews most of Pabst's beers.  The brewery was closed by Pabst in 1999 and sold.
Answer: Stroh Brewery Company