Question: London Pride is the flagship beer of a brewery founded in what year?

Context paragraphs:
Estrella Damm: Estrella Damm is a lager beer, brewed in Barcelona, Spain.  It has existed since 1876, when August Küntzmann Damm founded his brewery in Barcelona, and is the flagship beer of S.A. Damm, a prominent brewery in the city.  The brand is the oldest in Spain and the name "Estrella" means "star" in both Catalan and Spanish.  Estrella Damm is available in many countries, including Australia, Brazil, Bulgaria, Canada, Cyprus, Croatia, Greece, Ukraine, Norway, Poland, Portugal, Sweden, Taiwan, Georgia, Honduras and the UK in a 4.6% version.  In the United States, it is available through United States Beverage, LLC.  Despite its name, Estrella Damm should not be confused with another Spanish lager, called Estrella Galicia.

London Pride (beer): London Pride is the flagship beer of Fuller's Brewery.  It is the UK's best-selling cask-conditioned ale, and is also sold worldwide in bottled form.

Fuller's Brewery: Fuller's Brewery (Fuller, Smith & Turner plc) is an independent family regional brewery founded in 1845 in Chiswick, West London.

Moonlight Brewing Company: The Moonlight Brewing Company is a brewery founded in 1992 by Brian Hunt in Santa Rosa, California, USA.  It is known for its flagship beer, Death & Taxes, which is popular in Sonoma County, California.  In 2008, it received the

Bavarian Brewing Company: Bavarian Brewing Company was a brewery established in Covington, Kentucky, in 1866 by Julius Deglow, but became known as the Bavarian Brewery in the 1870s.  The brewery was originally located on Pike Street and the business expanded to include the 12th street property by 1877.  The company also operated as the John Meyer Brewery and the Meyer-Riedlin Brewery before becoming incorporated at Bavarian Brewery Co. in 1889 by William Riedlin.  The company was family owned until it was acquired by International Breweries, Inc.(IBI) in 1959.  However, it operated as the Bavarian Division of IBI and continued to produce its flagship beer, Bavarian's, until the facility closed in 1966.  The property was placed on the National Register of Historic Places in 1996 and rehabilitated shortly thereafter.

Saxifraga × urbium: London Pride, Saxifraga × urbium, is a perennial garden flowering plant.  Alternative names for it include St. Patrick's Cabbage, Whimsey, Prattling Parnell, and Look Up And Kiss Me.  Before 1700 the London Pride appellation was given to the Sweet William.

St Austell Brewery: St Austell Brewery is a brewery founded in 1851 by Walter Hicks in St Austell, Cornwall, England.  The brewery's flagship beer is "Tribute Ale", which accounts for around 80% of sales.  Other popular ales include "Proper Job", "Tinner's Ale" and "Duchy Bitter".

De Koninck Brewery: De Koninck Brewery (Brouwerij De Koninck) is a Belgian brewery based in Antwerp ("Antwerpen" in Dutch).  The glass in which De Koninck's flagship beer is served is called a "bolleke", although this term is most colloquially used to refer to a glass filled with the beer itself and is the way the beer is ordered in bars.

Churchkey Can Company: Churchkey Can Company is a brewery founded in 2012 by actor Adrian Grenier and former Nike designer Justin Hawkins in Seattle, USA.  The brewery's name refers to its flagship beer, which must be opened using a can piercer, or "church key".

Starobrno Brewery: Starobrno Brewery (in Czech: Pivovar Starobrno) is a Czech brewery located in the city of Brno.  It was built as a successor of the brewery founded in 1325, as a part of Cistercian convent.  The brewery was named "Starobrno Brewery" only in the second half of the 19th century.  In 2009, Starobrno Brewery produced more than one million hectoliters of beer.  The same year, the brewery merged with the Royal Brewery of Krušovice and became a part of the Dutch brewing company Heineken.

Supporting paragraphs: London Pride (beer) Fuller's Brewery
Answer: 1845