Question: The Old Style Saloon No. 10, is located in Deadwood a city in South Dakota, United States, and the county seat of which County?

Context paragraphs:
Lake Traverse Indian Reservation: The Lake Traverse Indian Reservation is the homeland of the Sisseton Wahpeton Oyate, a branch of the Santee Dakota group of Native Americans.  The reservation is located in parts of five counties in extreme northeastern South Dakota and parts of two counties in southeastern North Dakota, United States.  Over 60 percent of its land area lies in Roberts County, South Dakota, but there are lesser amounts in Marshall, Day, Grant, and Codington counties in South Dakota, as well as Sargent and Richland counties in North Dakota.  Its resident population of 10,408 persons was counted during the 2000 census.  About one-third of its inhabitants claim to be of solely Native American heritage.  Its largest community is the city of Sisseton, South Dakota.

Deadwood, South Dakota: Deadwood (Lakota: "Owáyasuta"; "To approve or confirm things") is a city in South Dakota, United States, and the county seat of Lawrence County.  It is named after the dead trees found in its gulch.  The population was 1,270 according to the 2010 census.  The entire city is a National Historic Landmark District, for its well-preserved Gold Rush-era architecture.

Rapid City, South Dakota: Rapid City (Lakota: "Mni Lúzahaŋ Otȟúŋwahe" ; "Swift Water City") is the second-largest city in South Dakota (after Sioux Falls) and the county seat of Pennington County.  Named after Rapid Creek, on which the city is established, it is set against the eastern slope of the Black Hills mountain range.  The population was 67,956 as of the 2010 Census.  Known as the "Gateway to the Black Hills" and the "City of Presidents", it is split by a low mountain ridge that divides the western and eastern parts of the city.  Ellsworth Air Force Base is located on the outskirts of the city.  Camp Rapid, a part of the South Dakota Army National Guard, is located in the western part of the city.  The historic "Old West" town of Deadwood is nearby.  In the neighboring Black Hills are the popular tourist attractions of Mount Rushmore, the Crazy Horse Memorial, Custer State Park, and Wind Cave National Park.

Brookings, South Dakota: Brookings is a city in Brookings County, South Dakota, United States.  Brookings is the fourth largest city in South Dakota, with a population of 22,056 at the 2010 census.  It is the county seat of Brookings County, and home to South Dakota State University, the largest institution of higher education in the state.  Also found in Brookings are the South Dakota Art Museum, the Children's Museum of South Dakota, the annual Brookings Summer Arts Festival, and the headquarters of a number of manufacturing companies and agricultural operations.

Jones County, South Dakota: Jones County is a county located in the U.S. state of South Dakota.  As of the 2010 census, the population was 1,006, making it the least populous county in South Dakota.  Its county seat is Murdo.  Created in 1916 and organized in 1917, it is the most recently established county in South Dakota.

Geography of South Dakota: South Dakota is a state located in the north-central United States.  It is usually considered to be in the Midwestern region of the country.  The state can generally be divided into three geographic regions: eastern South Dakota, western South Dakota, and the Black Hills.  Eastern South Dakota is lower in elevation and higher in precipitation than the western part of the state, and the Black Hills are a low, isolated mountain group in the southwestern corner of the state.  Smaller sub-regions in the state include the Coteau des Prairies, Coteau du Missouri, James River Valley, the Dissected Till Plains, and the Badlands.  Geologic formations in South Dakota range in age from two billion-year-old Precambrian granite in the Black Hills to glacial till deposited over the last few million years.  South Dakota is the 17th-largest state in the country.

Parker, South Dakota: Parker is a city in Turner County, South Dakota, United States.  The population was 1,024 at the 2010 census.  It is the county seat of Turner County.  It is bordered on its eastern side by South Dakota State Highway 19.  Its northern side is bordered by South Dakota State Highway 44.  It is about 8 miles northwest of Chancellor, 42 miles east of Parkston, and 41 miles south of Madison.

Old Style Saloon No. 10: The Old Style Saloon No. 10 is located in Deadwood, South Dakota, United States.  The Saloon is best known as the site where the American Old West legend Wild Bill Hickok was assassinated while playing a game of poker by Jack McCall on August 2, 1876.  Saloon No. 10 was originally located on placer claim number 10 from which its name is derived.  Fire swept through the mining camp in 1879 destroying the original structure, and a bar was later built at its former location.

Brown County, South Dakota: Brown County is a county located in the U.S. state of South Dakota.  As of the 2010 census, the population was 36,531, making it the fourth-most populous county in South Dakota.  Its county seat is Aberdeen.  The county is named after Alfred Brown, of Hutchinson County, South Dakota, a Dakota Territory legislator in 1879.

Deadwood Formation: The Deadwood Formation is a geologic formation of the Williston Basin and Western Canada Sedimentary Basin.  It is present in parts of North and South Dakota and Montana in the United States, and in parts of Alberta, Saskatchewan, and southwestern corner of Manitoba in Canada.  It is of Late Cambrian to Early Ordovician age and was named for exposures in Whitewood Creek near Deadwood, South Dakota.  It is a significant aquifer in some areas, and its conglomerates yielded significant quantities of gold in the Black Hills of South Dakota.

Supporting paragraphs: Old Style Saloon No. 10 Deadwood, South Dakota
Answer: Lawrence