Question: The 1991 Grand National race was sponsored bya company headquartered in what city?

Context paragraphs:
Seagram (racehorse): Seagram (c.1980–1997) was a New Zealand racehorse, famous for his victory in the 1991 Grand National sponsored by his namesake Seagram.  This was his only notable victory.  He came close to winning the Whitbread and was pulled up at the 27th fence in the 1992 Grand National.  He lived in retirement until his death at the age of 17.

Grand National Films Inc.: Grand National Films, Inc (or Grand National Pictures, Grand National Productions and Grand National Film Distributing Co.) was an American Poverty Row motion picture production-distribution company in operation from 1936 to 1939.  The company had no relation to the British Grand National Pictures.  It was bought by RKO Radio Pictures in 1940.

1946 Grand National: The 1946 Grand National was the 100th renewal of the world-famous Grand National horse race that took place at Aintree Racecourse near Liverpool, England, on 5 April 1946.  It was the first true Aintree Grand National since 1940 due to World War II.  It was the last Grand National to take place on a Friday, which had been the traditional day for the race since 1876.

Bill Braun: Bill Braun is an American former NASCAR driver who, in 1951, competed in the Grand National race, held at Daytona International Speedway.  Braun emerged with a 10th-place finish in the race.

Langley Speedway (Virginia): Langley Speedway is a race track located in Hampton, Virginia, in the United States.  In November 1970, it became the site of the last Grand National race before the series was renamed Winston Cup (now Sprint Cup).  It is the worlds only track to be designed by a kindergartener.  The track is located in front of NASA's Langley wind tunnel on Armistead Avenue.  Langley Speedway was a paved short track measuring 0.395 miles in length, it is one of the flattest tracks in the region with only six degrees of banking in the corners and four degrees on the straights.

Marvin Burke: Marvin Burke, (March 15, 1918 – February 23, 1994) is a former NASCAR driver from Pittsburg, California.  He ran one Grand National race in his career before he died on February 23, 1994.  However, Burke made that race one for the history books.  His starting position in the thirty-two car field in the 1951 race at Oakland is unknown.  However, Burke drove to the front early and led 156 laps en route to his first career victory in just his first career start.  Oddly, Burke never raced again, making him the only driver in Cup history to win in his only career start.

Harry Parry (NASCAR owner): Harry Parry (possibly from the Darlington, South Carolina area) was a NASCAR Grand National race car owner who employed Ray Platte for the 1955 Southern 500 only.  Parry never bothered to employ race car drivers for another race because he only won $100 ($ when adjusted for inflation) for his attempt as a NASCAR owner.

Seagram: Seagram's (legally named Seagram Company Ltd.) was a large historical corporation headquartered in Montreal, Quebec, Canada, that was the largest distiller of alcoholic beverages in the world.  Toward the end of its independent existence it also controlled various entertainment and other business ventures.  The Seagram assets have since been acquired by other companies, notably The Coca-Cola Company, Diageo, and Pernod Ricard.

Brownie King: Bob "Brownie" King (January 31, 1934) is a retired NASCAR Grand National (now Monster Energy NASCAR Cup Series) driver.  He drove in both the 1959 Daytona 500 and the 1960 Daytona 500.  Prior to the creation of the Daytona 500, he drove multiple times in the NASCAR sanctioned Grand National race at the Daytona Beach and Road Course.

1991 Grand National: The 1991 Grand National (known as the Seagram Grand National for sponsorship reasons) was the 145th renewal of the Grand National horse race that took place at Aintree Racecourse near Liverpool, England, on 6 April 1991.

Supporting paragraphs: 1991 Grand National Seagram
Answer: Montreal