Question: Eric Brock was a football coach in a city that is the county seat of what county?

Context paragraphs:
Ellicott City, Maryland: Ellicott City is an unincorporated community and census-designated place, along with being the county seat of local government in Howard County, Maryland, United States.  It is part of the Baltimore Metropolitan Area.  The population was 65,834 at the 2010 census.  Founded in 1772, the town contains the B. & O. Railroad Museum's branch at the Ellicott City Station, built in 1830 as the first terminus of the initial line.  The downtown historic district is located in the valley of the small Tiber River, with its east end abutting the Patapsco River, which forms the Baltimore County line.  As of the 2000 census, Ellicott City surpassed Towson (county seat of neighboring Baltimore County) for the first time, as the largest unincorporated county seat in the country.

Johnston Library: The Johnston Library is a historic library located at 210 W. 10th St. in Baxter Springs, Kansas.  The building was constructed in 1872 to serve as a courthouse during Baxter Springs' unsuccessful attempt to become the Cherokee County seat.  Though Baxter Springs had lost an election to choose the county seat in 1869 to Columbus, supporters of both cities had attempted to fraudulently swing the election in their favor, and Baxter Springs hoped it could still become county seat in the future.  The building initially served as the county jail and sheriff's office until Columbus completed its jail in 1880.  After this, Baxter Springs ultimately gave up its attempts to become the county seat, and the building became its city hall.  In 1905, resident Niles P. Johnston bequeathed $5,000 to the city to start a library, and the city hall building was chosen to house it.

Stan Brock: Stanley James Brock (born June 8, 1958) is a former American football player and coach.  He played as a tackle at the University of Colorado at Boulder and in the National Football League for the New Orleans Saints and the San Diego Chargers.  Brock served as the head football coach at United States Military Academy from 2007 to 2008.  He was fired on December 12, 2008 after compiling a 6–18 record in two years as head coach.

Cerro Gordo County Courthouse (Iowa): The Cerro Gordo County Courthouse is located in Mason City, Iowa, United States.  When Cerro Gordo County was created in 1855 and Mason City was selected to be the county seat.  Dissatisfaction in the western part of the county led the Iowa legislature to appoint three new commissioners who would move the county seat to Livonia.  A courthouse was built there.  A petition signed by over half of the citizens of the county requested that the county seat be moved back to Mason City.  Mason City also won the election in 1858 to decide the matter 155-48.  Two courthouses have stood in Mason City prior to the present Modernist structure that was occupied by the county in 1960.  It had been built as the Standard Oil Building, and was acquired by the county in 1959 for $159,400 and then remodeled for their use.

Eric Brock (American football coach): Eric "Gus" Brock is an American football coach.  Brock was the head football coach for the Haskell Indian Nations University in Lawrence, Kansas for eight seasons, from 2002 until 2009.  His coaching record at Haskell Indian Nations was 22–60.

William W. Church: William Wells Church (December 17, 1874 – March 28, 1966) was an American football coach.  He served as the head football coach at Purdue University for one season, in 1897, and at Georgetown University for two seasons, in 1899 and 1901, compiling a career college football record of 5–3–1.  A native of Chicago, he was an alumnus of Princeton University.  He married Mary Myrtle Brock in 1902.

Lawrence, Kansas: Lawrence is the county seat of Douglas County and sixth largest city in Kansas.  It is located in the northeastern sector of the state, next to Interstate 70, between the Kansas and Wakarusa Rivers.  As of the 2010 census, the city's population was 87,643.  Lawrence is a college town and the home to the University of Kansas and Haskell Indian Nations University.

Mason, Michigan: Mason is a city in the U.S. state of Michigan.  It is named after the state's first governor, Stevens T. Mason.  As of the 2010 census, the city population was 8,252.  It is the county seat of Ingham County.  Mason is the only city in the U.S. that serves as a county seat ahead of a state capital, with the capital of Lansing also in Ingham County.  Despite Mason being the county seat, many county offices and courtrooms are located in Lansing.

Tom Keele: Tom Keele (born c. 1933) is a former American football coach.  He served as the head football coach at California State University, Northridge from 1979 to 1985, compiling a record of 31–42–1.  Keele graduated from Jefferson High School in Portland Oregon in 1951.  He attended the University of Oregon, where he played football for the Oregon Webfoots as a tackle from 1957 to 1959.  Keele began his coaching career in 1960 at North Eugene High School in Eugene, Oregon, working two years as an assistant football coach and sophomore basketball coach.  He moved to Oregon City High School in Oregon City, Oregon in 1962, serving as head football coach and leading his team to a 9–1–1 record.  The following year, he was hired as head football coach at the newly-formed Sheldon High School in Eugene.

Eric Brock (safety): Eric Brock (born April 4, 1985) is a former American football safety who played for two seasons for the Atlanta Falcons of the National Football League (NFL).  After playing college football for the Auburn Tigers, he was signed by the Falcons as an undrafted free agent in 2008.

Supporting paragraphs: Eric Brock (American football coach) Lawrence, Kansas
Answer: Douglas County