Question: What is the population of Todd Sears' birthplace?

full_context: Document 1: 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 2: Derrick Seaver: Derrick Seaver is a former member of the Ohio House of Representatives, representing the 78th District from 2001 to 2006. His election in 2000 was notable as he was elected to office at 18 years of age.
Document 3: Todd Claus: Todd W. Claus (born March 24, 1969) is an American baseball scout. He also has been an infielder, coach, manager and advance scout in professional baseball, and an assistant coach in college baseball. A switch hitter who threw right-handed, Claus stands tall and weighs .
Document 4: Todd Burns: Burns attended Oral Roberts University in Tulsa, Oklahoma, earning first-team All-America honors before being drafted by the Oakland Athletics in the 7th round of the 1984 MLB amateur draft. He played for the A's from 1988 to 1991, and would also play for the Texas Rangers (1992–1993), and St. Louis Cardinals (1993). He was nicknamed "The Mad Hatter" because of his habit of frantically tugging at the bill of his cap and re-adjusting it prior to every pitch as well as "Third Degree" for his penchant of giving up runs near the end of his career.
Document 5: 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 6: Todd Sears: Todd Andrew Sears (born October 23, 1975 in Des Moines, Iowa) is a former Major League Baseball first baseman for the Minnesota Twins and San Diego Padres.
Document 7: Zach Sorensen: Zach Hart Sorensen (born January 3, 1977 in Salt Lake City, Utah) is a former Major League Baseball second baseman and shortstop.
Document 8: Matt Macri: Matthew Michael Macri (born May 29, 1982 in Des Moines, Iowa) is a Major League Baseball player who plays third base.
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 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 11: 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 12: 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.
Document 13: Principal Park: Principal Park, formerly Sec Taylor Stadium, is a minor league baseball stadium in Des Moines, Iowa. It is the home field of the Pacific Coast League's Iowa Cubs.
Document 14: 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 15: 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.
ground_truth: 645,911
sub_queries: Todd Sears >> place of birth Answer: Des Moines
what is the population of the Des Moines area Answer: 645,911