Question: What county is the headquarters of Tombras Group located?

full_context: Document 1: Goodby, Silverstein & Partners: The agency was founded in 1983 as Goodby, Berlin & Silverstein by Jeff Goodby, Andy Berlin and Rich Silverstein. Andy Berlin left in 1992 and the agency was renamed. Goodby, Silverstein & Partners is now part of the Omnicom Group, Inc., an advertising holding company. The agency is based in San Francisco, CA. In 2015, after 32 years, Rich Silverstein and Jeff Goodby announced they were passing on the reigns of the creative department to Margaret Johnson, Executive Creative Director and Eric Kallman, Executive Creative Director. Margaret and Eric were also named to Adweek's Creative 100 list in 2015. Derek Robson has been the President and Managing Partner since 2005.
Document 2: Nike, Inc.: In 1976, the company hired John Brown and Partners, based in Seattle, as its first advertising agency. The following year, the agency created the first ``brand ad ''for Nike, called`` There is no finish line'', in which no Nike product was shown. By 1980, Nike had attained a 50% market share in the U.S. athletic shoe market, and the company went public in December of that year.
Document 3: Government of Canada Building, Moncton: The Government of Canada Building is one of the tallest buildings in Moncton, New Brunswick. The building is 34 meters tall and has 9 floors. The building was constructed in 1977 and is located at 777 Main Street in downtown Moncton. It is mainly used as offices for the Government of Canada as well as various lawyers. The entire top floor of the building is occupied by offices for Freedom 55 Financial and the Quadrus Group both divisions of the London Life Insurance Company.
Document 4: Sells Ltd: Sells Ltd, an advertising agency, was opened in 1869 in London. By 1900, it was the largest agency in the world with offices in London, Paris, Edinburgh and Montreal. In the 1950s it made advertising history when it appointed the first woman to be a managing director in the business. Olive Hirst had joined Sells in 1931 as a typist and then worked across a number of departments. In January 1950, she was the first women to be appointed to the Board and in 1954 she took over the managing directors role.
Document 5: The Shand Group: The Shand Group (also known as TSG) is an independent, integrated advertising and marketing agency located in Santa Barbara, CA, and operating satellite offices in Los Angeles, New York, San Francisco, Seattle and Austin. The agency was founded in Los Angeles in 1982 by president Bobby Shand, and operates with ten to thirty employees and contract associates. Marketing services include: market positioning and strategy, brand identity, advertising and collateral, web development, media planning and placement. TSG’s client base includes products and services aimed at the upscale consumer and trade markets.
Document 6: Adland: Adland was founded by Åsk Wäppling in 1996, who uses the nom de plume "Dabitch" on the site. According to Wäppling, "we preserve, we publish, we deliver, we review and sometimes harass all advertising there is." Adland began as a place to collect plagiarized ads under the title "Badland," and has grown into the largest archive of commercials in the world. The site also houses an archive of over forty years of Super Bowl commercials.
Document 7: Tennessee: Local law enforcement is divided between County Sheriff's Offices and Municipal Police Departments. Tennessee's Constitution requires that each County have an elected Sheriff. In 94 of the 95 counties the Sheriff is the chief law enforcement officer in the county and has jurisdiction over the county as a whole. Each Sheriff's Office is responsible for warrant service, court security, jail operations and primary law enforcement in the unincorporated areas of a county as well as providing support to the municipal police departments. Incorporated municipalities are required to maintain a police department to provide police services within their corporate limits.
Document 8: City Center Square: City Center Square is a skyscraper in downtown Kansas City, Missouri, built by Skidmore, Owings & Merrill, in the Spring of 1977. It occupies the entire block of 11th Street to 12th Street, and from Main Street to Baltimore Street. It's tower is 30 stories tall, constructed with a reinforced concrete structure evident by the look of the exterior. It is the tenth-tallest habitable structure in the Kansas City Metropolitan Area, and the fifteenth-tallest habitable structure in Missouri at .
Document 9: Clark County Government Center: The Clark County Government Center serves as the government center building for Clark County, Nevada. It is located in Downtown Las Vegas. The complex designed by Fentress Bradburn and opened in 1995 consists of a six-story county administration building, three one-story buildings for the county commissioners’ chambers, a multipurpose community facility and a central plant. It includes space for government administration, a law enforcement complex, a performing arts complex, a child-care facility and structured parking. It also contains a single-story auditorium, a pyramid-shaped cafeteria and a cylindrical, six-story reception hall, as well as office buildings.
Document 10: Universal Attractions Agency: In business since 1949, UAA is located in New York City. The agency’s history includes launching the career of the soul singer James Brown and representing him for more than 40 years.
Document 11: Knoxville City-County Building: The Knoxville City-County Building is a building at 400 Main Street in Knoxville, Tennessee that houses the offices of the city government of Knoxville and the county government of Knox County, Tennessee. It also houses the Knox County Jail. The building stands ten stories, and contains of office space. At the time it was built it was said to be the largest office building in Tennessee.
Document 12: The San Jose Group: The San Jose Group (SJG) is a privately held multicultural marketing and advertising agency based in Chicago. SJG is a member of the San Jose Network which operates 33 offices in 18 countries, serving 36 markets across the US and Latin America. The agency also operates SJ Public Relations (SJPR) and San Jose Consulting (SJC).
Document 13: Minneapolis City Hall: Minneapolis City Hall and Hennepin County Courthouse (also known as the Municipal Building), designed by Long and Kees in 1888, is the main building used by the city government of Minneapolis, Minnesota as well as by Hennepin County, Minnesota. The structure has served as mainly local government offices since it was built, and today the building is 60 percent occupied by the city and 40 percent occupied by the County. The building is jointly owned by the city and county and managed by the Municipal Building Commission. The Commission consists of the chair of the County Board, the mayor of the City of Minneapolis, a member of the County Board and a member of the Minneapolis City Council. The County Board chair serves as the president of the Commission and the mayor serves as the vice president. The building bears a striking resemblance to the city hall buildings in Cincinnati and Toronto. The City Hall and Courthouse was added to the National Register of Historic Places in 1974.
Document 14: Tombras Group: Charles Tombras Advertising, Inc., dba The Tombras Group, is a full service advertising agency founded in 1946 and headquartered in Knoxville, Tennessee, noted for its national advertising campaigns in the United States. In 2015 The Tombras Group was honored as National Small Agency of the Year, presented by Advertising Age.
Document 15: William R. Snodgrass Tennessee Tower: The William R. Snodgrass Tennessee Tower (also known as the Tennessee Tower) is a skyscraper in downtown Nashville, Tennessee, that houses Tennessee government offices. The tower was built for the National Life and Accident Insurance Company and served as its National Life Center until the State of Tennessee acquired it on January 3, 1994. More than 1,000 state employees who had been assigned to numerous locations now work in the building.
ground_truth: Knox County
sub_queries: Tombras Group >> headquarters location Answer: Knoxville
Knoxville >> located in the administrative territorial entity Answer: Knox County