Question: What was the name of the Australian bred Thoroughbred racehorse who won Australia's most prestigious annual Thoroughbred horse race in 1950?

full_context: Document 1: VRC Stakes day: The VRC Stakes day (also known as the Emirates Stakes day), is the final day of the Melbourne Spring Racing Carnival at Flemington Racecourse. Stakes Day is held on the Saturday directly following Melbourne Cup Day (the first Tuesday in November). The 'Stakes' were first run in 1881 as the Coburg Stakes. In 2016 the LKS Mackinnon Stakes was moved from the VRC Victoria Derby day and renamed to the Emirate Stakes. The original "Stakes" were in turn moved to the first Day of the carnival and renamed as the Longines Mile.
Document 2: Queen Elizabeth II Challenge Cup Stakes: The Queen Elizabeth II Challenge Cup is an American Thoroughbred horse race for three-year-old fillies held annually since 1984 at Keeneland Race Course near Lexington, Kentucky. Run at a distance of one and one-eighth miles on the turf, the Grade I race currently offers a purse of $500,000. It is an important prep race to the Breeders' Cup Filly & Mare Turf.
Document 3: Commonwealth Turf Cup: The Commonwealth Turf Cup is an American Thoroughbred horse race held each year since 2015 at Laurel Park in Laurel, Maryland. It was previously known as the Colonial Turf Cup when it was held at Colonial Downs race track in New Kent County, Virginia. It is raced on turf at a distance of one mile and is open to horses aged three years old and up. The current purse is $200,000.
Document 4: Caulfield Autumn Classic: The Caulfield Autumn Classic is a Melbourne Racing Club Group 2 Thoroughbred horse race for horses three years old held under Set Weights conditions, over a distance of 1800 metres at Caulfield Racecourse in Melbourne, Australia in February. Total prizemoney for the race is A$200,000. Total prizemoney is A$200,000.
Document 5: 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".
Document 6: Cheltenham Chase: The 'Cheltenham Chase, currently known for sponsorship purposes as the Shloer Chase, is a Grade 2 National Hunt chase in Great Britain which is open to horses aged five years or older. It is run on the Old Course at Cheltenham over a distance of about 2 miles (3,219 metres), and during its running there are twelve fences to be jumped. The race is scheduled to take place each year in November on the Sunday of the Open meeting.
Document 7: Ajax II: Ajax was a champion Australian bred Thoroughbred racehorse and sire, who won 18 consecutive races before he was defeated at the odds of 40/1 on, causing a huge racing sensation. He had wins from 5 furlongs (1,000 metres) to 1½ miles (2,400 metres), equalled the Australasian record for a mile (1,600 metres), and created three new race records. At stud in Australia, Ajax proved to be a good sire. He was then sold as a 14-year-old horse and exported to the United States before he was later sold to Bing Crosby and Lin Howard. Ajax was inducted into the Australian Racing Hall of Fame in 2004.
Document 8: Belmont Stakes: The Belmont Stakes is an American Grade I stakes Thoroughbred horse race held every June at Belmont Park in Elmont, New York. It is a 1.5 mi horse race, open to three-year-old Thoroughbreds. Colts and geldings carry a weight of 126 lb ; fillies carry 121 lb . The race, nicknamed The Test of the Champion, and The Run for the Carnations, is the third and final leg of the Triple Crown and is held five weeks after the Kentucky Derby and three weeks after the Preakness Stakes. The 1973 Belmont Stakes and Triple Crown winner Secretariat holds the mile and a half stakes record (which is also a track and world record on dirt) of 2:24.
Document 9: Russia (horse): Russia was a hardy Australian bred Thoroughbred racehorse who won the 1946 Melbourne Cup and other staying races.
Document 10: Breeders' Cup Dirt Mile: The Breeders' Cup Dirt Mile is a 1 mi Weight for Age stakes race for thoroughbred racehorses three years old and up. As its name implies, it is part of the Breeders' Cup World Championships, the "de facto" year-end championship for North American thoroughbred racing, and is run on a dirt course (either natural dirt or a synthetic surface such as Polytrack). This contrasts with the similar Breeders' Cup Mile, run on grass. All Breeders' Cups to date have been conducted in the United States, with the exception of the 1996 event in Canada.
Document 11: Sunline: Sunline (1995–2009) was a New Zealand bred Thoroughbred racehorse who was the world's highest earning racemare of her time, competing on 48 occasions for 32 wins, 9 seconds and 3 thirds to earn A$11,351,607. She won races in three different countries, Australia, New Zealand and Hong Kong. She won successive W.S. Cox Plates (2,040m), the richest Weight for Age (WFA) race in Australia. She also twice won the toughest mile race in Australia, the Doncaster Handicap, once as a three-year-old and then again as a six-year-old. She was named New Zealand Horse of the Year four times and is also the only horse ever to win the Australian Horse of the Year championship three times. The only horse besides Sunline to win as many major races in both Australia and New Zealand was Gloaming, who raced around 1915.
Document 12: Kingston Town: Kingston Town (31 August 1976 – March 1991) was an outstanding Australian bred Thoroughbred racehorse who won a record three Cox Plates and 11 other Group One races in a career spanning from 1979 to 1982. In 1980 he was awarded the honour of being the Australian Champion Racehorse of the Year.
Document 13: Shocking (horse): Shocking is an Australian bred Thoroughbred racehorse, trained by Mark Kavanagh, who won the 149th Melbourne Cup on 3 November 2009 by three-quarters of a length.
Document 14: The Barb: The Barb (1863–1888) was an Australian bred Thoroughbred racehorse, famed for winning the 1866 Melbourne Cup, the Sydney Cup twice, and other quality races. He was bred by George Lee and foaled in 1863 at Leeholme, near Bathurst, New South Wales.
Document 15: Comic Court: Comic Court (1945–1973) was a most versatile post-war Australian bred Thoroughbred racehorse who set race records at distances of 6 furlongs (1,200 metres) and 2 miles (3,200 metres). He won the 1950 Melbourne Cup carrying 9 st and set an Australasian record of 3 minutes 19½ seconds.
ground_truth: Comic Court