Question: Which group conducts the Australia's annual Thoroughbred horse race in which the Archer won in the 1860s? 

Context paragraphs:
Hendrie Stakes: The Hendrie Stakes is a Thoroughbred horse race run annually at Woodbine Racetrack in Toronto, Ontario, Canada.  Held in mid May, the Grade III sprint race is open to fillies and mares, aged four and older and is contested over a distance of six and a half furlongs on Polytrack synthetic dirt.  It offers a purse of $116,205 with an additional $50,000 for Ontario-bred horses provided by the Canadian Thoroughbred Horse Society (CTHS) through its Thoroughbred Improvement Program (TIP).

B J McLachlan Plate: B J McLachlan Plate is a registered Brisbane Racing Club Group 3 Thoroughbred horse race horse race for two-year-olds run at set weights over a distance of 1200 metres at Eagle Farm Racecourse, Brisbane, Australia in late December.  Total prizemoney is A$200,000.

Josie Carroll: Josie Carroll (born December 8, 1957 in Scarborough, Ontario) is a Canadian Thoroughbred horse trainer and the first woman trainer to win the Queen's Plate, the oldest thoroughbred horse race in Canada and Canada's most prestigious race.

Kingfisher Ultra Indian Derby: The Kingfisher Ultra Indian Derby, or simply the Indian Derby, is an Indian annual Thoroughbred horse race.  It is a 2,400-metre race held on the first Sunday of February on the Mahalaxmi Racecourse in Mumbai and is one of the premier sporting activities in the city.

Vo Rogue Plate: Vo Rogue Plate is a registered Brisbane Racing Club Group 3 Thoroughbred horse race horse race for three-year-olds run at set weights over a distance of 1300 metres at Eagle Farm Racecourse, Brisbane, Queensland, Australia in late December.  Total prizemoney is A$150,000.

Queen's Plate: The Queen's Plate is Canada's oldest thoroughbred horse race, having been founded in 1860.  It is also the oldest continuously run race in North America.  It is run at a distance of 1 ⁄ miles for a maximum of 17 three-year-old thoroughbred horses foaled in Canada.  The race takes place each summer, in June or July, at Woodbine Racetrack, Etobicoke, Ontario, and is the first race in the Canadian Triple Crown.

Ontario Sire Stakes: The Ontario Sire Stakes is a category of Canadian Thoroughbred and Standardbred horse race.  For Thoroughbred horse races, the race is restricted to horses of either sex sired by a stallion standing in the Province of Ontario for his entire season the year of conception and registered with the Canadian Thoroughbred Horse Society for that season.

Archer (horse): Archer (1856–1872) was an Australian Thoroughbred racehorse who won the first and the second Melbourne Cups in 1861 and 1862.  He won both Cups easily, and is one of only five horses to win the Melbourne Cup twice or more; he is one of only four horses to win two successive Cups.  In 2017 Archer was inducted to the Australian Racing Hall of Fame.

Melbourne Cup: The Melbourne Cup is Australia's most prestigious annual Thoroughbred horse race.  It is a 3,200 metre race for three-year-olds and over, conducted by the Victoria Racing Club on the Flemington Racecourse in Melbourne, Victoria as part of the Melbourne Spring Racing Carnival.  It is the richest "two-mile" handicap in the world, and one of the richest turf races.  The event starts at 3pm on the first Tuesday in November and is known locally as "the race that stops a nation".

Political handicapping: The terms horse race and handicapping the horse race, have been used to describe media coverage of elections.  The terms refer to any news story or article whose main focus is describing how a particular candidate or candidates is faring during the election, in other words, trying to predict the outcome.  This category includes polls.  There is a thin line between a horse race news story and a non horse race news story.  For example, an article simply describing a candidate's economic policy is a non horse race article, but an article which is about how certain groups of voters are angry at a candidate's economic policy is a horse race article.

Supporting paragraphs: Archer (horse) Melbourne Cup
Answer: Victoria Racing Club