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

full_context: Document 1: Lansing, Kansas: Lansing is a city situated along the Missouri River in the eastern part of Leavenworth County, located in northeast Kansas, in the Central United States. As of the 2010 census, the city population was 11,265. It is the second most populous city of Leavenworth County and is a part of the Kansas City metropolitan area.
Document 2: Gus Bradley: Paul Casey "Gus" Bradley (born July 5, 1966) is an American football coach who is the current defensive coordinator for the Los Angeles Chargers of the National Football League. He was the defensive coordinator for the Seattle Seahawks from 2009 to 2012, and the head coach for the Jacksonville Jaguars from 2013 to 2016.
Document 3: 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.
Document 4: 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.
Document 5: University of Kansas: The University of Kansas, often referred to as KU or Kansas, is a public research university in the U.S. state of Kansas. The main campus in Lawrence, one of the largest college towns in Kansas, is on Mount Oread, the highest elevation in Lawrence. Two branch campuses are in the Kansas City metropolitan area: the Edwards Campus in Overland Park, and the university's medical school and hospital in Kansas City. There are also educational and research sites in Parsons, Topeka, Garden City, Hays, and Leavenworth, and branches of the medical school in Wichita and Salina. The university is one of the 62 members of the Association of American Universities.
Document 6: Elias &quot;Coach&quot; Korcoulis: Elias Korcoulis, known to his friends as Lou and to thousands others as Coach (1940 – March 4, 2006) was the cross-country and track coach for Hollis/Brookline High School in Hollis, New Hampshire from 1962 until his death. Coach was an alumnus of Manchester High School Central, having lived in Manchester all his life. Coach would then go on to Phillips Exeter Academy and Keene State College. He began working at Hollis/Brookline in 1962 and started the cross-country, winter track, and spring track programs. During his career, Coach led the Hollis/Brookline Cavaliers to twenty-six state championships.
Document 7: Interstate 70 in Kansas: In the U.S. state of Kansas, Interstate 70 contains the first segment to start being paved and to be completed in the Interstate Highway System. It extends from the Colorado border near the town of Kanorado to the Missouri border in Kansas City. The route covers 424 mi and passes through several of the state's principal cities in the process including Kansas City, Topeka, and Salina. The route also passes through the cities of Lawrence, Junction City, and Abilene.
Document 8: Lawrence, Massachusetts: Lawrence is a city in Essex County, Massachusetts, United States, on the Merrimack River. As of the 2010 census, the city had a population of 76,377, which had risen to an estimated 78,197 as of 2014. Surrounding communities include Methuen to the north, Andover to the southwest, and North Andover to the southeast. Lawrence and Salem are the county seats of Essex County. Lawrence is part of the Merrimack Valley.
Document 9: 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.
Document 10: List of Oklahoma Sooners head football coaches: The Oklahoma Sooners football program is a college football team that represents the University of Oklahoma. The team has had 22 head coaches since organized football began in 1895. The Sooners have played in more than 1,200 games in its 121 seasons. In those seasons, eight coaches have led the Sooners to postseason bowl games: Tom Stidham, Jim Tatum, Bud Wilkinson, Gomer Jones, Chuck Fairbanks, Barry Switzer, Gary Gibbs and Bob Stoops. Eight coaches have won conference championships with the Sooners: Bennie Owen, Stidham, Dewey Luster, Tatum, Wilkinson, Fairbanks, Switzer and Stoops. Wilkinson, Switzer and Stoops have also won national championships with the Sooners. Stoops is the all-time leader in games coached and won, Owen is the all-time leader in years coached, while Switzer is the all-time leader in winning percentage. John Harts is, in terms of winning percentage, the worst coach the Sooners have had as he lost the only game he coached. John Blake has the lowest winning percentage of those who have coached more than one game with .353 in his 34 games.
Document 11: Leavenworth, Kansas: Leavenworth is the largest city in and the county seat of Leavenworth County, Kansas, United States. As of the 2010 census, the city population was 35,251. Located on the west bank of the Missouri River 25 mi northwest of Kansas City, Missouri, it is part of the Kansas City metropolitan area.
Document 12: Gus Malzahn: Arthur Gustavo "Gus" Malzahn, III (born October 28, 1965) is the head coach for the Auburn Tigers Football program and former football player at Henderson State University. He spent the 2012 season as the head football coach at Arkansas State University. From 2009 to 2011, Malzahn served as the offensive coordinator at Auburn University. In 2010, a season in which the Auburn Tigers won the national championship, Malzahn received the Broyles Award, which recognizes the top assistant coach in college football. Prior to his stints at Arkansas State and Auburn, Malzahn served as offensive coordinator at the University of Arkansas and the University of Tulsa, respectively.
Document 13: 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.
Document 14: Johnson County, Kansas: Johnson County (county code JO) is a county located in the U.S. state of Kansas. As of the 2010 census, the county population was 544,179, making it the most populous county in Kansas. Its county seat is Olathe, and its most populous city is Overland Park.
Document 15: Kansas City, Kansas: Kansas City is the third-largest city in the state of Kansas, the county seat of Wyandotte County, and the third-largest city of the Kansas City metropolitan area. Kansas City, Kansas is abbreviated as "KCK" to differentiate it from Kansas City, Missouri. It is part of a consolidated city-county government known as the "Unified Government". Wyandotte County also includes the independent cities of Bonner Springs and Edwardsville. As of the 2010 census, the city had a population of 145,786 residents. It is situated at Kaw Point, which is the junction of the Missouri and Kansas rivers.
ground_truth: Douglas County