Question: What is the seat of the county where Ronald Reagan Parkway is located?

Context paragraphs:
Ronald Reagan Washington National Airport: Ronald Reagan Washington National Airport (IATA: DCA, ICAO: KDCA, FAA LID: DCA) is an international airport 3 mi south of downtown Washington, D.C. in Arlington County, Virginia, United States.  It is the nearest commercial airport to the capital and serves the Baltimore-Washington metropolitan area.  For decades it was called Washington National Airport before being renamed to honor President Ronald Reagan in 1998.  The Metropolitan Washington Airports Authority (MWAA) operates the airport with close oversight by the federal government due to its proximity to the national capital.  It is a fortress hub for American Airlines.

Ronald W. Reagan High School: Ronald Wilson Reagan High School is a high school under the direction of the Winston-Salem/Forsyth County Schools system in Pfafftown, North Carolina, USA, named after former US president Ronald Reagan.  It had a student population of approximately 1,850 for the 2014/15 school year.  The school was constructed to begin operation at the beginning of the 2005/06 school year.  s of 2013 Reagan was a North Carolina 4A school, the state's highest level, whose principal was Frank Martin.  Reagan's student population increased since its opening, reaching the full available capacity until additions are made.  A new wing was completed and opened for the 2009/10 school year.  Each classroom is equipped with a teacher workstation and corresponding monitors.  The class of 2007 was the first to graduate from Reagan High School.

Birthplace of Ronald Reagan: The Birthplace of Ronald Reagan, also known as the Graham Building, is located in an apartment on the second floor of a late 19th-century commercial building in Tampico, Illinois, United States.  The building was built in 1896 and housed a tavern from that time until 1915.  On February 6, 1911 the future 40th President of the United States, Ronald Reagan, was born in the apartment there, the family moving into a house in Tampico a few months later.

Ronald Reagan High School (San Antonio): Ronald Reagan High School is a Texas UIL Division 6A public high school located in the North East Independent School District and named after U.S. President Ronald Reagan.  The school serves roughly 3,500 students and is currently under the leadership of Brenda Shelton.  The school was previously led by Bill Boyd (2005-2013) and Joe Hannon (1999-2004).

Gwinnett County, Georgia: Gwinnett County is a county in the north central portion of the U.S. state of Georgia.  As of 2016, the population is estimated to be 907,135, making it the second-most populous county in Georgia.  Its county seat is Lawrenceville.  The county is named for Button Gwinnett, one of the signers of the Declaration of Independence.

Ronald Reagan Washington National Airport station: Ronald Reagan Washington National Airport (formerly National Airport) is a Washington Metro station in Arlington, Virginia on the Blue and Yellow Lines.  The station platform is elevated and covered and is the last above ground station on the Yellow Line in Virginia, heading into Washington, D.C. It is one of only two stations in the system to have three tracks (the other being West Falls Church).  The station is located across Smith Boulevard from the B and C terminals at Ronald Reagan Washington National Airport (DCA); the airport shuttle bus carries people to and from Terminal A.  The mezzanines are directly connected to the B and C terminals by pedestrian walkways to Level 2 (gate level).  The airport's Abingdon Plantation historical site is near the station.

Ronald Reagan Parkway (Indiana): Ronald Reagan Parkway and Ameriplex Parkway is a parkway-type road named in part after former U.S. President Ronald Reagan.  The road was commissioned in the 1990s, and the initial 1 mi section from U.S. Highway 36 to County Road 100 N (CR 100 N) was completed in 1996.  It was later extended to CR 200 N.  The segment from CR 200 N to CR 300 N opened in early 2015.  Construction on The section from CR 300 N to the existing road connecting to US 136 began in 2015 and will be completed in late 2017.

Veterans Parkway (Savannah, Georgia): Veterans Parkway (also known as Southwest Bypass) is a 6.1 mi long freeway in the Savannah metropolitan area, connecting Georgetown with downtown Savannah, completely within Chatham County.  It is not a state route, nor is it maintained by the Georgia Department of Transportation (GDOT); it is one of a handful of county-maintained freeways in Georgia.  Other county maintained freeways include Ronald Reagan Parkway, Harry S. Truman Parkway, and a portion of the East–West Connector in Cobb County.  Most of the route parallels Hunter Army Airfield (Hunter AAF), which is located to the east of the highway.  At its northern terminus, I-516 east/SR 21 south provides access to Hunter AAF.  On Georgia State Route 204 it is not signed as Veterans Parkway, it is signed to Downtown Savannah.  It is slated to become part of Interstate 3

Ronald Reagan Parkway: Ronald Reagan Parkway (RRP) is a controlled-access highway located entirely within Gwinnett County, Georgia, and connects the Lilburn area with Snellville.  It is named after Ronald Reagan, the 40th president.  The highway was spearheaded by then-Gwinnett County chairman Wayne Mason in the mid-1990s.

Ronald Reagan Boyhood Home: The Ronald Reagan Boyhood Home is the house located at 816 South Hennepin Avenue, Dixon, Illinois, in which the late former President of the United States Ronald Reagan lived as a youth beginning in 1920.  The building was listed on the National Register of Historic Places in 1982.

Supporting paragraphs: Ronald Reagan Parkway Gwinnett County, Georgia
Answer: Lawrenceville