Question: What is the population of the area where Faculty Lounge was formed?

full_context: Document 1: 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 2: 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 3: Lowell Music Magnet School: Lowell Music Magnet School, also known as Lowell Elementary School is an elementary school in Duluth, Minnesota. It serves students in grades K-5. It is a magnet school that provides musical education in orchestra, band, choir, and piano. Lowell Music Magnet Elementary School serves 494 students in grades KG-5. The school's student:teacher ratio of 17:1 is higher than the MN state average of 15:1.
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: REO Speedwagon: They made a list of songs to learn over the summer break, and Doughty landed a summer job to buy his first keyboard. On his Farfisa organ, he learned ``Light My Fire ''by The Doors. The members returned to school in the fall of 1967, and had their first rehearsal before classes even started. They named the band REO Speedwagon, from the REO Speed Wagon, a flatbed truck Doughty had studied in transportation history, and the initials are those of its founder Ransom E. Olds. Rather than pronouncing REO as a single word as the motor company did, they chose to spell out the name with the individual letters each pronounced (`` R-E-O''). An ad in the school newspaper produced their first job, a fraternity party that turned into a food fight. They continued to perform cover songs in campus bars, fraternity parties, and university events. The first lineup consisted of Doughty on keyboards, Gratzer on drums and vocals, Joe Matt on guitar and vocals, Mike Blair on bass and vocals.
Document 6: Washington University in St. Louis: Washington University has a large number of student-run musical groups on campus, including 12 official a cappella groups. The Pikers, an all-male group, is the oldest such group on campus. The Greenleafs, an all-female group is the oldest (and only) female group on campus. The Mosaic Whispers, founded in 1991, is the oldest co-ed group on campus. They have produced 9 albums and have appeared on a number of compilation albums, including Ben Folds' Ben Folds Presents: University A Cappella! The Amateurs, who also appeared on this album, is another co-ed a cappella group on campus, founded in 1991. They have recorded seven albums and toured extensively. After Dark is a co-ed a cappella group founded in 2001. It has released three albums and has won several Contemporary A Capella Recording (CARA) awards. In 2008 the group performed on MSNBC during coverage of the vice presidential debate with specially written songs about Joe Biden and Sarah Palin. The Ghost Lights, founded in 2010, is the campus's newest and only Broadway, Movies, and Television soundtrack group. They have performed multiple philanthropic concerts in the greater St. Louis area and were honored in November 2010 with the opportunity to perform for Nobel Laureate Douglass North at his birthday celebration.
Document 7: Two Door Cinema Club: Trimble, Halliday and Baird formed another band shortly after the demise of their first musical project; on this occasion, a permanent drummer was not included. An interim drummer by the name of Owen Bullington was appointed but was kicked out due to creative differences. The new band's name was taken from Halliday's mispronunciation of the name of the local cinema, the Tudor Cinema; in 2007, Two Door Cinema Club was formed. Following an increased interest in the band's social network page, the three members forewent their university places and commenced work on studio material.
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: 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: The Dregs: The Dregs began as an a cappella group formed by improv comedian and bodhrán drummer Tim Wick at the Minnesota Renaissance Festival in 2001 under the moniker "Pub Kin". It consisted loosely of over a dozen members who were meant to serve drinks and entertain patrons of Mac's Pub, a vacant merchant shop turned ale house with an Irish theme. In practice, it became problematic for performers to operate the pub on their own, so tending bar became the responsibility of the Minnesota Jaycees, and Pub Kin was reduced to purely a music act.
Document 11: Slack Season: Formed by students at the University of Florida, the band played their first gig at the Gainesville venue The Covered Dish and went on to perform there frequently for a period of several years. The band toured the US and shared the stage with Blink-182, Bloodhound Gang, Less Than Jake, For Squirrels, Fastball, Marvelous 3, Harvey Danger, James Brown and others. They performed at many music venues including CBGB, Mercury Lounge, House of Blues and others. They also performed at festivals including CMJ Music Marathon, Sundance Film Festival, Warped Tour, Stop the Violence, NEMO, Atlantis Music Conference and Alachua County Music Harvest, among others. In 1999, the Gainesville music community awarded the band "Favorite Pop Band" at the annual Hogtown Music Awards and they were later profiled in Billboard magazine.
Document 12: 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 13: 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 14: Michael Ivins: Along with Mark Coyne and Wayne Coyne, he formed The Flaming Lips in 1983 in Oklahoma City, Oklahoma. According to frontman Coyne, Ivins was found as the bassist for the band because of his punk-rock look, and not because of his musical ability. In fact, Ivins initially couldn't play bass, but he learned how and has been the bassist for the band ever since. Ivins developed an interest in the recording process and has helped engineer the Flaming Lips' studio recordings since 1994.
Document 15: Faculty Lounge: Faculty Lounge is a band based in Des Moines, Iowa, created during Halloween of 2000 by bassist Dave Maxwell, guitarist Timm Pilcher, and drummer Mark Stallman. The band is made up of nine players, all of whom are either current or former teachers, coaches, and/or administrators in the Des Moines Public School system or surrounding area.
ground_truth: 645,911
sub_queries: Faculty Lounge >> location of formation Answer: Des Moines
what is the population of the Des Moines area Answer: 645,911