Question: What city holds the country seat in Lamar County?

Context paragraphs:
Lamar County Airport: Lamar County Airport (FAA LID: M55) is a public-use airport in Lamar County, Alabama, United States.  It is owned by the Lamar County Commission and located six nautical miles (7 mi, 11 km) north of the central business district of Vernon, Alabama.

Lamar County Comprehensive High School: Lamar County Comprehensive High School is a public high school located in Barnesville, Georgia, United States.  The school is part of the Lamar County School District, which serves Lamar County.

Lamar County School District (Georgia): The Lamar County School District is a public school district in Lamar County, Georgia, United States, based in Barnesville.  It serves the communities of Aldora, Barnesville, and Milner.

Purvis, Mississippi: Purvis is a city in Lamar County, Mississippi.  It is part of the Hattiesburg, Mississippi Metropolitan Statistical Area.  The population was 2,164 at the 2000 census.  It is the county seat of Lamar County.  The Town of Purvis was incorporated on February 25, 1888 and was founded by and named after Thomas Melville Purves, originally of Marion County, Alabama.  Purves, born March 8, 1820, was a second generation Scottish-American; his grandfather emigrated to Charleston, South Carolina in 1765.

Sulligent, Alabama: Sulligent is a city in Lamar County, Alabama, United States.  As of the 2010 census, the population of the city is 1,927, down from its record high of 2,151 in 2000.  From 1910-1950 and again in 2000, it was the largest community in Lamar County before losing the distinction both times to the county seat of Vernon.  The name is derived from railroad personnel.

Lamar County, Mississippi: Lamar County is a county located in the U.S. state of Mississippi.  As of the 2010 census, the population was 55,658.  Its county seat is Purvis.  Named for the post-Civil War Mississippi statesman Lucius Quintus Cincinnatus Lamar, the county was carved out of Marion County to the west in 1904.

Vernon, Alabama: Vernon is a city in Lamar County, Alabama, United States.  The city is the county seat of Lamar County, and previously served as the seat of its two predecessors, Jones County (not to be confused with Covington County), which briefly existed in 1867, and for Sanford County from 1868 until it was renamed Lamar in 1877.  It incorporated in 1870.  At the 2010 census the population was 2,000, down from 2,143 in 2000.  It is the largest city in Lamar County as of 2010, and previously held the distinction in 1880 and from 1960-1990, falling to 2nd place in 2000 behind Sulligent, but since reclaiming the title.

Lamar County Historical Museum: The Lamar County Historical Museum is a local history museum that documents Lamar County, Texas, and its county seat, Paris.  It is located on West Kaufman Street in an area of Paris known as Heritage Park, where it is situated immediately south of Heritage Hall.  The museum is operated by the Lamar County Historical Society.  It is open between 10 am and 4 pm on Fridays and Saturdays only, and while it does not charge an admission fee, it does accept donations.

Barnesville, Georgia: Barnesville is a city in Lamar County, Georgia, United States.  The city is a part of the Atlanta Metropolitan Area.  As of the 2010 census, the city had a population of 6,755.  The city is the county seat of Lamar County.

Baxterville, Mississippi: Baxterville is an unincorporated community in Lamar County, Mississippi.  It is located in the southwestern portion of Lamar County along Mississippi Highway 13, southwest of Hattiesburg.

Supporting paragraphs: Lamar County, Mississippi Purvis, Mississippi
Answer: Purvis