Question: What is the population of the area of the city where Doug Winslow was born?

full_context: Document 1: Dave Dowling: The following season, Dowling was claimed on waivers by the Cubs and he spent two years in the Chicago farm system before an end-of-season recall in 1966. The last-place Cubs started him against Cincinnati on September 22 and Dowling yielded only two earned runs — both coming in the first inning — on ten hits, going the distance to defeat veteran Reds' lefthander Joe Nuxhall. He never pitched again in the Majors, spending 1967 and 1968 working for minor league affiliates of the Cubs, Cardinals and San Francisco Giants. All told, Dowling yielded 12 hits in ten MLB innings, with no bases on balls and three strikeouts.
Document 2: Demetrius Douglas: Demetrius Douglas is Democratic member of the Georgia House of Representatives, serving since 2013. Douglas was a linebacker for the University of Georgia Bulldogs. He also played briefly in the NFL and CFL. Douglas is currently a mortgage broker and high school football coach.
Document 3: 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 4: 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 5: Drew Brees: Drew Christopher Brees (/ briːz /;) (born January 15, 1979) is an American football quarterback for the New Orleans Saints of the National Football League (NFL). After a prolific college football career at Purdue University, he was chosen by the San Diego Chargers with the first pick in the second round of the 2001 NFL Draft. He left college as one of the most decorated players in Purdue and Big Ten Conference history, establishing two NCAA records, 13 Big Ten Conference records, and 19 Purdue University records. As of 2017, he remains the Big Ten record - holder in several passing categories, including completions (1,026), attempts (1,678), and yards (11,792).
Document 6: 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 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: Doug Winslow: Charles Douglas Winslow (born July 19, 1951 in Des Moines, Iowa) is a former American football wide receiver in the National Football League for the New Orleans Saints and Washington Redskins. He played college football at Drake University and was drafted in the eighth round of the 1973 NFL Draft.
Document 9: 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 10: 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 11: 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 12: Carlos Carson: Carlos Andre Carson (born December 28, 1958) is a former professional American football player drafted by the Kansas City Chiefs in the fifth round of the 1980 NFL Draft. A , 184 lb wide receiver from Louisiana State University, Carson played in 10 NFL seasons from 1980 to 1989. His best year came during the 1983 season when he caught 80 receptions for 1,351 yards and seven touchdowns. During that same season, Carson had the second most receiving yards in the NFL, only behind Philadelphia Eagles receiver Mike Quick with 1,409 yards.
Document 13: Donald James Winslow: Donald James Winslow (1911 – 10 July 2010) was a professor at Boston University in Boston, United States who specialized in the subject of biography.
Document 14: Doug Hudson: Benjamin Douglas Hudson (born September 11, 1964 in Memphis, Tennessee) is a former professional American football quarterback for the Kansas City Chiefs of the National Football League (NFL). He graduated from Gulf Breeze, FL high school and played collegiate football at Nicholls State University
Document 15: Doug Williams (quarterback): Douglas Lee Williams (born August 9, 1955) is a former American football quarterback and former head coach of the Grambling State Tigers football team. Williams is known for his remarkable performance with the Washington Redskins in Super Bowl XXII. Williams, who was named the Super Bowl MVP, passed for a Super Bowl record 340 yards and four touchdowns, with one interception. He was the first African - American starting quarterback to win a Super Bowl. Williams also became the first player in Super Bowl history to pass for four touchdowns in a single quarter, and four in a half. Williams is now a team executive for the Redskins, being hired for that role in 2014.
ground_truth: 645,911
sub_queries: Doug Winslow >> place of birth Answer: Des Moines
what is the population of the Des Moines area Answer: 645,911