Question: What is the population of the area where Chad Crandell was born?

full_context: Document 1: 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 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: 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 4: 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 5: Matt Bobo: Matthew "Matt" Bobo (born January 6, 1977 in Des Moines, Iowa) is an American soccer player who last played for Carolina RailHawks in the North American Soccer League.
Document 6: Craig Dahl: Craig Dahl (born June 17, 1985) is a former American football safety who played nine seasons in the National Football League. He was signed by the Giants as an undrafted free agent in 2007. He played college football at North Dakota State.
Document 7: Chris Sanders (wide receiver): Christopher Dwayne Sanders (born May 8, 1972) is a former American football wide receiver who was a multi-sport athlete at the Ohio State University before playing seven seasons in the National Football League for the Houston/Tennessee Oilers/Titans. He attended Montbello High School in Denver, Colorado.
Document 8: Chad Dukes (American football): Chad Everett Dukes (born December 29, 1971 in Albany, New York) is a former American football running back in the National Football League for the Washington Redskins (1998–2000), San Diego Chargers (1998), St. Louis Rams (2000) and the Jacksonville Jaguars (2000) and played four games total in his NFL career (two for Jaguars, two for Skins). He played college football at the University of Pittsburgh. Dukes played on the Albany Firebirds (1998–1999) before his NFL career, the Colorado Crush (2004), the Manchester Wolves (2002–2003) and the Philadelphia Soul after his NFL career in the Arena Football League. Dukes won AFL Ironman of the year in 1998 when he was with the Firebirds. In 2004, he was a part of the 2004 Crush ArenaBowl XIX Championship team. In 2002, Dukes was named the defensive af2 Tough Man of the Year while playing for the Manchester Wolves in 2002.
Document 9: Chad Crandell: Chad Crandell, born July 8, 1975 in Des Moines, Iowa, United States was a U.S. soccer midfielder who spent most of his career with the USL Second Division Wilmington Hammerheads.
Document 10: 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 11: Curtis Bledsoe: Curtis Kemp Bledsoe (born March 19, 1957 in Odessa, Texas) is a former professional American football player who played fullback, halfback, and running back. He played in the National Football League for the Kansas City Chiefs in 1981 and 1982. He later played for the Arizona Wranglers, Washington Federals and Orlando Renegades of the USFL. Bledsoe played college football for
Document 12: List of foreign Premier League goalscorers: Jozy Altidore -- Hull City, Sunderland DaMarcus Beasley -- Manchester City Carlos Bocanegra -- Fulham Geoff Cameron -- Stoke City Jay DeMerit -- Watford Clint Dempsey -- Fulham, Tottenham Hotspur (57) Landon Donovan -- Everton Brad Friedel -- Blackburn Rovers John Harkes -- Sheffield Wednesday Stuart Holden -- Bolton Wanderers Tim Howard -- Everton Cobi Jones -- Coventry City Jovan Kirovski -- Birmingham City Eric Lichaj -- Aston Villa Brian McBride -- Everton, Fulham Joe - Max Moore -- Everton Preki -- Everton Claudio Reyna -- Sunderland, Manchester City Jonathan Spector -- West Ham United Roy Wegerle -- Blackburn Rovers, Coventry City
Document 13: 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 14: Chester Crandell: Chester J. Crandell (June 19, 1946 – August 4, 2014) was an American politician and a Republican member of the Arizona Senate representing District 6 since January 14, 2013. Crandell served consecutively in the Arizona State Legislature from January 10, 2011 until January 14, 2013 in the Arizona House of Representatives District 5 seat.
Document 15: 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.
ground_truth: 645,911
sub_queries: Chad Crandell >> place of birth Answer: Des Moines
what is the population of the Des Moines area Answer: 645,911