Question: Stags' Leap Winery in California, was purchased by Australian beer group with interests in brewing and soft drinks in what year?

Context paragraphs:
Stags' Leap Winery: Stags' Leap Winery is a winery located near Yountville, California, in the Stags Leap District of Napa Valley.  The winery's 240 acre estate vineyard was first planted in 1893.  In 1997, Stags' Leap was purchased by Beringer Wine Estates, which in 2000 was in turn purchased by the Australian company Foster's Group, whose two wine groups combined and are now Beringer-Blass Wine Estates.  Robert Brittan continued the revitalization of the vineyards and winery until 2005.

Stag's Leap Wine Cellars: Stag's Leap Wine Cellars is a winery founded by Warren Winiarski in 1970 and based in the Stags Leap District of Napa Valley, California.  The winery was sold to a joint venture by Chateau Ste. Michelle of Woodinville, Washington, and Marchesi Antinori Srl of Italy for $185 million in August 2007.  It is 50% owned by the Tobacco/Food Conglomerate Altria.

Geo. Hall &amp; Sons: Geo.  Hall & Sons, better known as Halls was a soft drink manufacturer founded in 1849 in Marryatville, South Australia, by English immigrant George Hall (1818-1881).  During his teenage years, Hall had pursued the brewing of non alcoholic drinks as a hobby.  Halls produced a wide range of soft drinks and cordials, having established itself as a local bottler specialising in "stonie" ginger beer by 1851.  Other soft drinks included Passiona, a Cottee's product they bottled for local consumption.

Quixote Winery: Quixote Winery is a boutique winery in the Stags Leap District of Napa Valley, California.  The winery produces organic red wine in the premium segment, and also features unusual, eclectic architecture and label design.

Cott: The Cott Corporation is a supplier of private label carbonated soft drinks distributing to the United States, Canada, Mexico, the United Kingdom, and Europe.  In addition to producing private-label beverages for retailers, Cott also has portfolio of its own brands, including Cott, RC (excluding the United States, where it is part of Dr Pepper Snapple Group), Ben Shaws, Stars & Stripes, Vintage and Vess soft drinks, ready-to-drink teas, sparkling and flavoured waters, sports and energy drinks, juice drinks and smoothies. Newer Cott brands include Orient Emporium, GL-7, Red Rain Energy and After Shock Energy.

Clos Du Val Winery: Clos Du Val Winery is a winery in the Stags Leap District of California's Napa Valley.  The winery was founded by two men who were born into the French wine business, John Goelet and Bernard Portet.  After scouting the world for two years to locate areas where they might produce Bordeaux-style wine, Portet identified the then-undiscovered Stag’s Leap district of California’s Napa Valley as especially promising.  Goelet bought 150 acre of vineyard land and established the winery in 1972.  The next year he bought 180 acre in the Los Carneros region to produce the Burgundian varieties, Pinot noir and Chardonnay.

Foster's Group: Foster's Group (now Foster's Group Pty. Ltd.) was an Australian beer group with interests in brewing and soft drinks.  Foster's Group Limited was based in Melbourne, Victoria and was renamed Carlton & United Breweries prior to sale to British-South African multinational SABMiller in 2011.  Foster's Group was the brewer of Foster's Lager.  Foster's wine business was split into a separate company, Treasury Wine Estates, in May 2011.

Baldacci Family Vineyards: Baldacci Family Vineyards is a California winery located in the Stags Leap District AVA of Napa Valley.  Thomas and Brenda Baldacci fell in love with the Napa Valley in 1998.  Their purchase of the 26 acre vineyard parcel, located in the heart of the famed Stags Leap District, marked the beginning of their commitment to land stewardship.  The winery developed as a natural outcome from their desire to share the land and wine with family and friends.  Today, Baldacci Family Vineyards owns 50 acres across three appellations and produces a diverse portfolio of estate grown wines from the Calistoga, Stags Leap, and Carneros AVA’s.  Son, Michael Baldacci, manages the daily operations of the winery.

Frog's Leap Winery: Frog's Leap Winery is a California wine producer that operates from Rutherford.  It was founded in 1981 on a spot along Mills Creek known as Frog Farm.  Frog's Leap Winery was established by John Williams and Larry Turley.

Stags Leap District AVA: The Stags Leap District AVA is an American Viticultural Area located within the Napa Valley AVA 6 mi north of the city of Napa, California.  The Stags Leap District was the first appellation to be designated an AVA based on the unique "terroir" characteristics of its soil.  The soil of this region include loam and clay sediments from the Napa River and volcanic soil deposits left over from erosion of the Vaca Mountains.  Like many Napa Valley AVAs, Stags Leap District is particularly known for its Cabernet Sauvignon.  In 1976 at the Judgment of Paris wine tasting, the 1973 Stag's Leap Wine Cellars Cabernet from the area that would become this AVA won first place in the red wine category, beating out classified Bordeaux estates.  Today, the Stags Leap District is home to twenty different wineries.

Supporting paragraphs: Stags' Leap Winery Foster's Group
Answer: 2000