Question: What city in Boone county Missuori is the location of the headqurters on Shelter Insurance Company?
Context: Shelter Insurance Company is a mutual insurance company which focuses on Auto, Property, Business, and Life Insurance.  It operates in fourteen U.S. states and the headquarters is in Columbia, Missouri. The Southern Aid and Insurance Company is an insurance company that was founded in 1893, just 28 years after the end of the Civil War, by a group of black men (American men of African ancestry) in Richmond, Virginia.  The purpose was to furnish adequate and affordable insurance protection to African-Americans.  The company was the first chartered insurance company organized by blacks in the United States and had the distinction of being the oldest black owned and operated insurance company in the nation.  It was also the largest African-American insurance company in the United States at one time.  The company's name was later changed to the Southern Aid Society of Virginia which was the forerunner of the Southern Aid Life Insurance Company. The Boone County Sheriff's Office (BCSO), is a local county law enforcement agency that serves Boone County, Kentucky.  The Boone County Sheriff's Office provides general-service law enforcement to unincorporated areas of Boone County, serving as the equivalent to county police for the unincorporated areas of the county.  It has only served in this role since the Boone County Police Department merged into the BCSO in 2001. Boone County Airport (IATA: HRO, ICAO: KHRO, FAA LID: HRO) is a county-owned public-use airport in Boone County, Arkansas, United States.  Also known as Boone County Regional Airport, it is located three nautical miles (6 km) northwest of the central business district of Harrison, Arkansas.  The airport serves the surrounding areas including Branson, Missouri.  It is mostly used for general aviation but is also served by one commercial airline, a service which is subsidized by the federal government's Essential Air Service program at a cost of $2,251,207(per year). Protective Life Corporation is a financial service holding company in Birmingham, Alabama.  The company’s primary subsidiary, Protective Life Insurance Company, was established in 1907 and now markets its products and services in all 50 states.  As of December 31, 2016, the corporation had more than 2,700 employees, annual revenues of $4.48 billion and assets of $75 billion.  In addition to Protective Life Insurance Company, Protective Life Corporation's subsidiaries include West Coast Life Insurance Company, MONY Life Insurance Company, Protective Life And Annuity Insurance Company, ProEquities Inc./Protective Securities, and Lyndon Property Insurance Company. Columbia is a city in the U.S. state of Missouri and the county seat of Boone County.  Founded in 1821, it is home to the University of Missouri and is the principal city of the Columbia Metropolitan Area.  It is Missouri's fourth most-populous city, with an estimated population of 120,612 in 2016.  As a midwestern college town, the city has a reputation for progressive politics, public art, and powerful journalism.  The tripartite establishment of Stephens College (1833), the University of Missouri (1839), and Columbia College (1851) has ever since made the city a center of education, culture, and athletic competition; these three schools surround the city's central business district to the east, south, and north.  At the center of Downtown is 8th Street, also known as the Avenue of the Columns, which connects Francis Quadrangle and Jesse Hall to the Boone County Courthouse and the City Hall.  Originally an agricultural town, the cultivation of the mind is Columbia's chief economic concern today.  Never a major center of manufacturing, the city also depends on healthcare, insurance, and technology businesses.  Several companies, such as Shelter Insurance, Carfax, and Slackers CDs and Games, were founded in the city.  Cultural institutions include the State Historical Society of Missouri, the Museum of Art and Archaeology, and the annual True/False Film Festival.  The Missouri Tigers, the state's only major college athletic program, play football at Faurot Field and basketball at Mizzou Arena as members of the Southeastern Conference (SEC). The Boone County Sheriff's Department is the agency responsible for general law enforcement, court services, and corrections services in Boone County, Missouri.  It is responsible for law enforcement in unincorporated Boone County, as well as in several municipalities.  Several cities including Columbia, as well as the University of Missouri, have their own police departments; however, all departments house prisoners in the Boone County Jail, operated by the BCSD.  The current sheriff of Boone County is Dwayne Carey, who has held the position since 2005, and ran unopposed in 2008 and 2012.  The BCSD is headquartered in Columbia, which is the county seat and the largest city in Boone County. Accident Fund Insurance Company of America is an American workers' compensation insurance company headquartered in Lansing, Michigan.  The company is a member of AF Group, a premier provider of innovative insurance solutions.  Insurance policies may be issued by any of the following companies within AF Group: Accident Fund Insurance Company of America, Accident Fund National Insurance Company, Accident Fund General Insurance Company, United Wisconsin Insurance Company, Third Coast Insurance Company or CompWest Insurance Company. The Boone County Courthouse is the location of the 13th Judicial Circuit of Missouri covering Boone and Callaway counties.  The courthouse is located in the Boone County Government Complex in downtown Columbia, Missouri.  It is the third court at this location.  The first of which housed a studio of George Caleb Bingham and is the subject of the painting 1855 painting "Verdict of the People. Physicians Mutual is a privately held insurance company headquartered in Omaha, Nebraska, United States, that consists of Physicians Mutual Insurance Company and Physicians Life Insurance Company.  Founded as Physicians Mutual Insurance Company in 1902 by Edwin E. Elliott, Physicians Mutual began by selling health insurance to medical professionals.  Policies were offered to the general public starting in 1962, and by 1970 the company expanded into life insurance when it founded Physicians Life Insurance Company.  Today the company offers a variety of insurance products, annuities, Medicare, Medigap, Medicare Supplement, Term Life Insurance, Whole Life Insurance, Cancer and funeral pre-planning services.  It holds over US$3 billion in assets and employs over one thousand people.  Robert A. Reed is chief executive officer and president.
Answer: Columbia, Missouri