Question: The San Antonio Museum of Art is an art museum in Downtown San Antonio, Texas, whose plans, in the early 1970s, were initiated to purchase the historic Lone Star Brewery, whose main beer was "Lone Star" marketed as what? 

Context paragraphs:
Terrell Hills, Texas: Terrell Hills is a city in Bexar County, Texas, United States; it is located 5 mi northeast of downtown San Antonio.  As of the 2010 census Terrell Hills had a population of 4,878.  It is part of a group of three cities — Terrell Hills, Alamo Heights, and Olmos Park — located between Uptown San Antonio, Midtown San Antonio, Downtown San Antonio, and Fort Sam Houston (a U.S. Army post).  Terrell Hills is bordered on the west by Alamo Heights, on the east by Fort Sam Houston, on the north by Uptown San Antonio, and on the south by San Antonio's Near East Side.  It is part of the San Antonio Metropolitan Statistical Area.

Milam Building: At 280 ft , the 21-story Milam Building in downtown San Antonio, Texas was the tallest brick and reinforced concrete structure in the United States when it opened in 1928, as well as the first high-rise air-conditioned office building.  The building was designed by George Willis, engineered by M.L. Diver, and constructed by L.T. Wright and Company.  The building was named in honor of the Republic of Texas historical figure Benjamin Milam, noted for his leadership during the Texas Revolution.  In keeping with that motif, the only flag that flies atop the tower is the Lone Star flag.

Lone Star Brewing Company: The Lone Star Brewery, built in 1884, was the first large mechanized brewery in Texas.  Adolphus Busch, of Anheuser-Busch, founded it along with a group of San Antonio businessmen.  The castle-like building now houses the San Antonio Museum of Art.  "Lone Star" beer was the company's main brand.  It was marketed as "The National Beer of Texas."  The Lone Star name is now owned by Pabst Brewing Co.  Production of "Lone Star" is currently contracted out to Miller Brewing Company in Fort Worth.  The Lone Star name is used in the Philippines under license to Asia Brewery for a brand of light beer.

Lone Star (1920 automobile): The Lone Star was made by Lone Star Motor Truck and Tractor Corp., San Antonio, Texas, from 1920 to 1922.  It was available as a 4-30 or 6-40, both utilizing Lycoming power units.  Both open and closed models were listed for sale.  The cars were manufactured for the Lone Star Corporation by Piedmont of Lynchburg, Virginia.

Old Lone Star Brewery: The Old Lone Star Brewery complex is located at 200 West Jones Avenue, downtown San Antonio, county of Bexar, in the U.S. state of Texas.  It was added to the National Register of Historic Places in 1972.

San Antonio Museum of Art: The San Antonio Museum of Art is an art museum in Downtown San Antonio, Texas, USA.  In the early 1970s, plans were initiated to purchase the historic Lone Star Brewery complex for conversion into it and following a $7.2 million renovation, it opened to the public in March 1981.  It was funded through grants from the Economic Development Administration of San Antonio, and numerous businessmen and foundations.

Buckhorn Saloon &amp; Museum (San Antonio): The Buckhorn Saloon & Museum is a privately run museum located at 318 E. Houston Street in Downtown San Antonio, Texas, U.S. Originally privately owned by Albert Friedrich, the Buckhorn became a tourist attraction for its unique collections.  Teddy Roosevelt and his Rough Riders were reputed to frequent the establishment.  Housed in 1956 in the Lone Star Brewery, the collection passed to Friedrich's heirs who had it moved to its current location.

Lone Star (St. Louis Southwestern train): The Lone Star was a passenger train operated by St. Louis Southwestern Railway (Cotton Belt) between Memphis, and Dallas, with through connections via Cotton Belt parent, Southern Pacific, for San Antonio, El Paso, and ultimately Los Angeles.  There were also through cars operating between Memphis, Lewisville and Shreveport.  At various times during the train's operation, connecting services were also provided from Brinkley to St. Louis.  The train was discontinued on November 1, 1952, as a part of extensive passenger train restructuring by St. Louis Southwestern.  The "Lone Star" was replaced by trains number 107 and 108 which connected with the Cotton Belt mainline at Mount Pleasant, Texas.

Witte Museum: The Witte Museum, established in 1926 under the charter of the San Antonio Museum Association, is located adjacent to Brackenridge Park in Midtown Brackenridge, San Antonio, Texas, USA, on the banks of the San Antonio River.  It is dedicated to natural history, science and South Texas heritage.  The permanent collection features historic artifacts and photographs, Texas art, textiles, the world-renowned Hertzberg Circus Collection, dinosaur bones, cave drawings, Texas wildlife dioramas and the four-story H-E-B Science Treehouse, in addition to nationally acclaimed traveling exhibits.  Artwork in the collection includes sculpture by San Antonio-born, Bonnie MacLeary.

Pearl Brewing 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.

Supporting paragraphs: San Antonio Museum of Art Lone Star Brewing Company
Answer: The National Beer of Texas