Question: What is the population of the area of Matt Snider's birthplace?

full_context: Document 1: Ryan Longwell: Ryan Walker Longwell (born August 16, 1974), is a retired American football kicker. After playing college football for the California Golden Bears, he started his professional football career with the San Francisco 49ers, but never played a game for the franchise. He then played for the Green Bay Packers from 1997 to 2005. He played for the Minnesota Vikings from 2006 to 2011. He also played briefly for the Seattle Seahawks during the 2012 playoffs.
Document 2: Saylorville, Iowa: Saylorville is a census-designated place (CDP) in Polk County, Iowa, United States. The population was 3,301 at the 2010 census. It is part of the Des Moines–West Des Moines Metropolitan Statistical Area. The Saydel Community School District is located in this area. The unincorporated community of Marquisville is in this area.
Document 3: Des Moines, Iowa: Age spread: 24.8% under the age of 18, 10.6% from 18 to 24, 31.8% from 25 to 44, 20.4% from 45 to 64, and 12.4% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 93.8 males. For every 100 females age 18 and over, there were 90.5 males.
Document 4: Matt Ryan (American football): Matthew Thomas Ryan (born May 17, 1985), nicknamed ``Matty Ice '', is an American football quarterback for the Atlanta Falcons of the National Football League (NFL). After playing college football for Boston College, Ryan was drafted by the Falcons with the third overall pick in the first round of the 2008 NFL Draft.
Document 5: Johnston, Iowa: Johnston is a city in Polk County, Iowa, United States. The population was 17,278 in the 2010 census, an increase of almost 100% from the 8,649 population in the 2000 census. It is part of the Des Moines–West Des Moines Metropolitan Statistical Area.
Document 6: Scott Radecic: Graduating from Brentwood High School in 1980, he played college football at Penn State University, where he was an Academic All-American in 1982. His brother Keith also played at Penn State and in the NFL for the St. Louis Cardinals in 1987.
Document 7: Des Moines, Iowa: On September 22, 1851, Des Moines was incorporated as a city; the charter was approved by voters on October 18. In 1857, the name ``Fort Des Moines ''was shortened to`` Des Moines'', and it was designated as the second state capital, previously at Iowa City. Growth was slow during the Civil War period, but the city exploded in size and importance after a railroad link was completed in 1866.
Document 8: Cedar Rapids, Iowa: As of the 2010 United States Census, the city population was 126,326. The estimated population of the three - county Metropolitan Statistical Area, which includes the nearby cities of Marion and Hiawatha, was 255,452 in 2008. Cedar Rapids is an economic hub of the state, located in the core of the Interstate 380.
Document 9: Gary Barnidge: Gary Michael Barnidge (born September 22, 1985) is a former American football tight end. He was drafted by the Carolina Panthers in the fifth round of the 2008 NFL Draft (picked 141st overall). He played college football at Louisville. He has also played for Cleveland Browns.
Document 10: Middletown, Iowa: Middletown is a city in Des Moines County, Iowa, United States. The population was 318 at the 2010 census. It is part of the Burlington, IA–IL Micropolitan Statistical Area.
Document 11: Ryan Succop: Ryan Barrow Succop (/ ˈsʌkʌp / ``suck - up ''; born September 19, 1986) is an American football placekicker for the Tennessee Titans of the National Football League (NFL). He became the 2009 Mr. Irrelevant by virtue of being selected by the Kansas City Chiefs with the final pick of the 2009 NFL Draft. Succop played college football at South Carolina.
Document 12: Matt Snider: Matthew "Matt" Kale Snider (born on January 26, 1976, in Des Moines, Iowa) is a former American football fullback from the University of Richmond. He graduated in 1999 with a Bachelor of Arts degree in Sports Science and Health. The Carolina Panthers offered him an NFL free agent contract in the spring of 1999. He spent the summer in Charlotte and went through three mini-camps with the club, but they released him after the third. The Green Bay Packers then offered him a two-year contract in July 1999, and Snider made the roster as the back-up fullback and special teams performer after coming into camp as the fourth-string fullback. One highlight of his career at Green Bay was a 66-yard touchdown reception at Lambeau Field.
Document 13: Des Moines metropolitan area: The Des Moines metropolitan area, officially known as the Des Moines -- West Des Moines, IA Metropolitan Statistical Area (MSA), consists of five counties in central Iowa, United States: Polk, Dallas, Warren, Madison, and Guthrie. The 2010 census population of these counties was 569,633, and the 2017 estimated population was 645,911.
Document 14: Sean Richardson (American football): Seandre Antonio Richardson (born January 21, 1990) is a former American football safety who previously played for the Green Bay Packers of the National Football League. He was signed by the Packers as an undrafted free agent in 2012. He played college football at Vanderbilt.
Document 15: Indianola, Iowa: Indianola is a city in Warren County, Iowa, United States, 18 miles south of Des Moines, Iowa. The population was 14,782 at the 2010 census. It is the county seat of Warren County.
ground_truth: 645,911
sub_queries: Matt Snider >> place of birth Answer: Des Moines
what is the population of the Des Moines area Answer: 645,911