Question: Tripel was the strongest beer in their range, in 1956, served at a Trappist brewery in what country?

full_context: Document 1: Grimbergen (beer): Grimbergen is the brand name of a variety of Belgian abbey beers. Originally made by Norbertine monks in the Belgian town of Grimbergen, it is now brewed by two different breweries in Belgium and France.
Document 2: Beer in Luxembourg: Luxembourg has a long tradition of beer brewing, dating back to at least 1300. Although there used to be more than 12 local breweries in Luxembourg in the early 1950s, this number has come down to only three big breweries remaining in the early 2010s. The three big breweries still active today are: Brasserie Nationale, producing "Bofferding" and "Battin", Brasserie de Luxembourg (owned by Anheuser-Busch InBev), producing "Diekirch" and "Mousel", and Brasserie Simon, producing "Simon" and "Ourdaller" (and "Okult").
Document 3: Tripel: Tripel is a term used by brewers or people mainly in the Low Countries, some other European countries, and the U.S. to describe a strong pale ale, loosely in the style of "Westmalle Tripel". The origin of the term is unknown, though the main theory is that it indicates strength in some way. It was used in 1956 by the Trappist brewery, Westmalle, to rename the strongest beer in their range, though both the term Tripel and the style of beer associated with the name (strong pale ale), were in existence before 1956. The style of Westmalle's "Tripel" and the name was widely copied by the breweries of Belgium, and in 1987 another Trappist brewery, the Koningshoeven in the Netherlands, expanded their range with a beer called "La Trappe Tripel", though they also produced a stronger beer they termed "La Trappe Quadrupel". The term spread to the U.S. and other countries, and is applied by a range of secular brewers to a strong pale ale in the style of "Westmalle Tripel".
Document 4: Fucking Hell: Fucking Hell is a German Pilsner or pale lager with an alcohol content of 4.9%. It is named after the village of Fucking in Austria; "hell" is the German word for 'pale' and a typical description of this kind of beer. The beer's name was initially controversial. Both the local authorities in Fucking and the European Union's Trade Marks and Designs Registration Office initially objected to the name. It was eventually accepted and the lager is now sold internationally.
Document 5: Herkenrode Tripel: Herkenrode Tripel is a Belgian Abbey beer brewed for the Herkenrode Foundation by commercial brewery St. Joseph in Opitter (Bree, Flanders in Belgium). It is on the market since July 2009. It has an alcohol by volume percentage of 7%. In June 2009 the Federation of Belgian Brewers awarded the beer the name and the logo of Recognized Belgian Abbey Beer. In the Herkenrode Abbey in Hasselt, which was founded in 1182, beer was brewed until the French Revolution in the brewery of the abbey.
Document 6: India pale ale: India pale ale (IPA) is a hoppy beer style within the broader category of pale ale. It has also been referred to as "pale ale as prepared for India", "India ale", "pale India ale", or "pale export India ale".
Document 7: Bass Brewery: The Bass Brewery was founded in 1777 by William Bass in Burton-upon-Trent, England. The main brand was Bass Pale Ale, once the highest-selling beer in the UK. By 1877, Bass had become the largest brewery in the world, with an annual output of one million barrels. Its pale ale was exported throughout the British Empire, and the company's distinctive red triangle became the UK's first registered trademark.
Document 8: Achel Brewery: Achel Brewery or Brouwerij der Sint-Benedictusabdij de Achelse Kluis is a Belgian Trappist brewery, and the smallest of the Belgian Trappist breweries. It is located in the Abbey of Saint Benedict in the Belgian municipality of Hamont-Achel. It brews five Trappist beers.
Document 9: Chimay Brewery: Chimay Brewery ("Brasserie de Chimay") is a beer brewery in Chimay, southern Hainaut, Belgium. The brewery is located in the Scourmont Abbey, a Trappist monastery, and is one of the eleven breweries worldwide that produce Trappist beer. They make three ales: Chimay Rouge, Chimay Bleue, and Chimay Blanche; and they make one "patersbier", intended for the monks. The monastery also makes four varieties of cheese.
Document 10: Old ale: Old ale is a term commonly applied to dark, malty beers in England, generally above 5% abv, also to dark ales of any strength in Australia. Sometimes associated with "stock ale" or, archaically, "keeping ale", in which the beer is held at the brewery.
Document 11: Bush (beer): Bush is a Belgian beer. There are a few types of Bush but the most famous is the high-fermentation amber beer with a strong taste of malt. Also known as Bush 12, its official name is now Amber Bush. It is the flagship product of the Dubuisson Brewery, situated in Pipaix in the municipality of Leuze-en-Hainaut, Belgium. Bush has an alcohol level that reaches 12% and makes Amber Bush one of the strongest beers. Its label claims that it is "The strongest Belgian beer".
Document 12: Westmalle Brewery: Westmalle Brewery (Brouwerij der Trappisten van Westmalle) is a Trappist brewery in the Westmalle Abbey, Belgium. It produces three beers, designated as Trappist beer by the International Trappist Association. Westmalle Tripel is credited with being the first golden strong pale ale to use the term Tripel.
Document 13: Belle-Vue Brewery: Belle-Vue Brewery is a brewery founded in 1913 in Molenbeek, Brussels by Philémon Vandenstock from nearby Itterbeek, which lies in a region known for its lambic type of beer. Belle-Vue is now owned by Anheuser–Busch InBev. A variety of Belle-Vue lambic and fruit beers are produced at AB InBev's facilities located in Sint-Pieters-Leeuw.
Document 14: Rochefort Abbey: The Trappist Abbey of Rochefort or Abbey of Notre-Dame de Saint-Rémy, which belongs to the Cistercians of Strict Observance, is located in Rochefort in the province of Namur (Wallonia, Belgium). The abbey is famous for its spiritual life and its brewery, which is one of few Trappist beer breweries in the world. Life in the abbey is characterised by prayer, reading and manual work, the three basic elements of Trappist life. The motto of the abbey is "Curvata Resurgo".
Document 15: Stout: Stout is a dark beer made using roasted malt or roasted barley, hops, water and yeast. Stouts were traditionally the generic term for the strongest or stoutest porters, typically 7% or 8%, produced by a brewery.
ground_truth: Belgium