Question: Alf Ellison was the chairman of operations at what farm implement maker in the United Kingdom?

full_context: Document 1: Art Ellison: Arthur Wayland "Art" Ellison (1899–1994) was an actor and director who worked for the Kansas City Power and Light Company for forty-eight years before becoming a professional actor. Prior to that, he had appeared in scores of amateur stage productions in the Kansas City area. He was born in Potsdam, New York and he died in Kansas City, Missouri. Director Herk Harvey speculated that Art Ellison had acted in more industrial and educational films than any other, including some directed by a young Robert Altman. He is best known for his part in the 1962 cult-classic horror film "Carnival of Souls".
Document 2: Branston Booths: Branston Booths is a small village in the North Kesteven district of Lincolnshire, England. The village is situated approximately 5 mi east from the city and county town of Lincoln, and stands at the intersection of the Car Dyke and Branston Delph drain.
Document 3: Pioneer Implement Company: The Pioneer Implement Company, also known as the International Harvester Transfer House, is a historic building located in Council Bluffs, Iowa, United States. Eli Shugart, Ferdinand Weis and F.R. Davis formed Pioneer Implement Company in 1893, and they built the four-story Late Victorian section of the building the same year. This was during a period of growth in the city's "Implement District," which is located to the south of the central business district. What made this company standout from the others in the district is that it was locally owned and operated agricultural implement business, rather than one owned by a factory from the east. The company went out of business in 1915 and the building was taken over by International Harvester, which owned the building next door. They added the single story brick addition to the south in 1927. When IH closed their Council Bluffs operation in 1964 they were the only farm implement that was still in business in the Implement District. The building was occupied by various businesses after that, including United Parcel Service. Artspace, Inc. acquired the building and converted it into live/work spaces for artists. The building was listed on the National Register of Historic Places in 2008.
Document 4: Alf Ellison: Alfred Owen Ellison (1 January 1903 – 12 June 1987), often referred to in print as A.O. Ellison and known colloquially as Alf or A.O., was an Australian solicitor, company director, racehorse owner and breeder. For over forty years he was the owner of Baramul Stud. Ellison served as chairman of the Australian operations of Mutual Acceptance Ltd (now Standard Chartered) and Lister Blackstone. He was President of the Bloodhorse Breeders' Association of N.S.W.
Document 5: Reeves &amp; Co.: Reeves & Co. was an American farm tractor builder for thirty years, based in Columbus, Indiana. It built some of the largest steam traction engines used in North America.
Document 6: Aldo Bensadoun: Albert "Aldo" Bensadoun, is originally an Algerian-Canadian businessman, investor and philanthropist. He is the founder and executive chairman of the ALDO Group, a retail shoe company based in Montreal, Quebec, Canada. Bensadoun is a sponsor of the ALDO Racing team, which has competed four times in the Dakar Rally.
Document 7: Blackstone River and Canal Heritage State Park: The Blackstone River and Canal Heritage State Park is a part of the state park system of the Commonwealth of Massachusetts, managed by the Massachusetts Department of Conservation and Recreation (DCR). This 1000 acre park "recalls the role of canals in transporting raw materials and manufactured goods between emerging industrial centers." The Blackstone River and Canal Heritage State Park at Uxbridge, Massachusetts, is the midpoint of the Blackstone River Valley National Heritage Corridor of the National Park System. The Blackstone River and Valley is where the industrial revolution was born in America. The southern entrance to this state park is the site of the historic Stanley Woolen Mill, currently being redeveloped for commercial and tourism. The Native American Nipmuc name for the village here was "Wacentug", translated as "bend in the river".
Document 8: Alex Vella: Alessio Emmanuel "Alex" Vella (born 1954), or The Maltese Falcon, is a Maltese businessman, former boxer, stand over man and National President of the Rebels Motorcycle Club in Australia. Despite having lived in Australia since the 1960s, he is not a citizen of the country. This caused visa problems when he tried to return to Australia after having gone to Japan with his son Adam (also a boxer) for a boxing match in 2007. The New South Wales Police Force tried to bar Vella from re-entering Australia then, but he was eventually allowed to return. In 2014 Vella visited Malta, and his residency visa was cancelled by the Minister for Immigration and Border Protection. Vella tried to appeal in the High Court in October 2015, but was not permitted to.
Document 9: Ellison Harvie: (Edythe) Ellison Harvie (18 May 1902 – 27 September 1984) was an Australian architect and an advocate for the professional development of women. In 1938, she became the first Australian woman to graduate with a Diploma of Architectural Design. Four years later she became the first woman to be elected to an Australian Architectural Institute council in 1942, as well as the first female Fellow of the Royal Victorian Institute of Architects in 1946. That same year, she became the first Australian woman to become a partner in a large firm.
Document 10: J. Bruce Llewellyn: J. Bruce Llewellyn (July 16, 1927 – April 7, 2010) was a prominent American businessman. His personal wealth has been estimated to exceed $160 million. In 1963, he joined others to found 100 Black Men of America, a social and philanthropic organization. In 1985, he and a group of business partners, among them Julius Erving, Bill Cosby, and Shahara Ahmad-Llewellyn, bought a majority share of the Philadelphia Coca-Cola Bottling Company, the first of the company's bottling plants to be acquired by a black person or persons.
Document 11: Oakleigh Thorne: W.O.S. Thorne, more generally known as Oakleigh Thorne (July 31, 1866 − May 23, 1948), was an American businessperson, a publisher of tax guides, a banker, and a philanthropist. Among his early ventures were the consolidation of brickyards on the Hudson River, and later he was president of the National Switch and Signal Company and Westinghouse Electric's vice president. In 1900 he came to New York City as vice president of the International Banking and Trust Company, becoming president. That company became the Trust Company of America, of which Thorne was serving as president. He helped the company survive a bank run during the Panic of 1907, securing the backing of J. Pierpont Morgan and European sources. He served as a director of Wells Fargo & Company from 1902 to 1918. In addition to his connection with Commerce Clearing House, Wells Fargo, and the Trust Company of America, Thorne was a director of the Corporation Trust Company and of the Bank of Millbrook. After purchasing Briarcliff Farms in 1918, he became a breeder of champion Angus cattle. He was inducted into the Angus Heritage Foundation Hall of Fame in 1934.
Document 12: Lincolnshire Curly Coat: The Lincolnshire Curly Coat or Lincolnshire Curly-coated, also known as the Baston Pig, is an extinct British breed of domestic pig. It originated in, and was named for, the county of Lincolnshire, in the eastern Midlands. Like many other traditional pig breeds, it became rare after the Second World War. By 1970 it had disappeared.
Document 13: Bruce Hemphill: Jonathan Bruce Hemphill (born June 1963) is a South African businessman. He is the chief executive of Old Mutual, an international long-term savings group and FTSE 100 company, since 1 November 2015, succeeding Julian Roberts.
Document 14: Stonyfield Farm (Wilton, New Hampshire): Stonyfield Farm, also known as the Ebenezer Barrett Farm, is a historic farm on Barrett Hill Road in Wilton, New Hampshire. The farm consists of 159 acre of land (which extends into neighboring Lyndeborough), which includes one major cluster of farm buildings, including an 1803 Federal style brick farmhouse, built by the land's first settler, Ebenezer Barrett. The farm was worked by Barrett and two generations of descendants during the 19th century, and became gentleman's farm in the early 20th century. The farm complex includes a 19th-century barn, a garage which was added c. 1920, and a c. 1927 greenhouse which was moved to the farm c. 1950. The property also includes a portion of Old Coach Road, a formerly public right-of-way, lined with stone walls, that was a significant north-south route. The property was leased in 1978 to the Rural Education Center, a non-profit agricultural education organization. The center was run by Samuel Kaymen, and it is here that the yogurt maker Stonyfield Farm was founded.
Document 15: Blackstone &amp; Co: Blackstone & Co. was a farm implement maker at Stamford, Lincolnshire, United Kingdom.
ground_truth: Blackstone & Co.