Question: What is the population of the place where the performer of Iron Man was born?

full_context: Document 1: Southern California: Southern California includes the heavily built-up urban area stretching along the Pacific coast from Ventura, through the Greater Los Angeles Area and the Inland Empire, and down to Greater San Diego. Southern California's population encompasses seven metropolitan areas, or MSAs: the Los Angeles metropolitan area, consisting of Los Angeles and Orange counties; the Inland Empire, consisting of Riverside and San Bernardino counties; the San Diego metropolitan area; the Oxnard–Thousand Oaks–Ventura metropolitan area; the Santa Barbara metro area; the San Luis Obispo metropolitan area; and the El Centro area. Out of these, three are heavy populated areas: the Los Angeles area with over 12 million inhabitants, the Riverside-San Bernardino area with over four million inhabitants, and the San Diego area with over 3 million inhabitants. For CSA metropolitan purposes, the five counties of Los Angeles, Orange, Riverside, San Bernardino, and Ventura are all combined to make up the Greater Los Angeles Area with over 17.5 million people. With over 22 million people, southern California contains roughly 60 percent of California's population.
Document 2: Menlo Park (band): It featured Harper Simon, Paul Simon's son. Also, its drummer was Seb Rochford, who won the BBC Rising Star Jazz Award in 2004 and leads the Mercury Prize-nominated experimental-jazz group Polar Bear.
Document 3: Far Cry (album): Far Cry is a jazz album by musician Eric Dolphy with trumpeter Booker Little, originally released in 1962 on New Jazz, a subsidiary of the Prestige label. Featuring their co-led quintet, it is one of the few studio recordings of their partnership. It is also one of the earliest appearances of bassist Ron Carter on record. Dolphy took part in Ornette Coleman's "" session before recording this album on the same day.
Document 4: At the Five Spot: At the Five Spot volumes one and two is a pair of jazz albums documenting one night (16 July 1961) from the end of Eric Dolphy and Booker Little's two-week residency at the Five Spot in New York. This was the only night to be recorded; the engineer was Rudy Van Gelder.
Document 5: Bass clarinet: The first jazz album on which the leader solely played bass clarinet was Great Ideas of Western Mann (1957) by Herbie Mann, better known as a flautist. However, avant - garde musician Eric Dolphy (1928 -- 1964) was the first major jazz soloist on the instrument, and established much of the vocabulary and technique used by later performers. He used the entire range of the instrument in his solos. Bennie Maupin emerged in the late 1960s as a primary player of the instrument, playing on Miles Davis's seminal record Bitches Brew as well as several records with Herbie Hancock's Mwandishi group. His style resembles Dolphy's in its use of advanced harmonies.
Document 6: Southern California: Within southern California are two major cities, Los Angeles and San Diego, as well as three of the country's largest metropolitan areas. With a population of 3,792,621, Los Angeles is the most populous city in California and the second most populous in the United States. To the south and with a population of 1,307,402 is San Diego, the second most populous city in the state and the eighth most populous in the nation.
Document 7: Southern California: Southern California is home to Los Angeles International Airport, the second-busiest airport in the United States by passenger volume (see World's busiest airports by passenger traffic) and the third by international passenger volume (see Busiest airports in the United States by international passenger traffic); San Diego International Airport the busiest single runway airport in the world; Van Nuys Airport, the world's busiest general aviation airport; major commercial airports at Orange County, Bakersfield, Ontario, Burbank and Long Beach; and numerous smaller commercial and general aviation airports.
Document 8: Michael Moore (bassist): Moore started on bass at age fifteen, at Withrow High School in Cincinnati, where he performed in ensembles and the Presentation Orchestra in George G. "Smittie" Smith's Withrow Minstrels. He played with his father in nightclubs in Cincinnati. He attended the Cincinnati College Conservatory, playing with Cal Collins and Woody Evans locally. He toured Africa and Europe with Woody Herman in 1966, and recorded with Dusko Goykovich while in Belgrade.
Document 9: Detroit: In the 1940s, Detroit blues artist John Lee Hooker became a long-term resident in the city's southwest Delray neighborhood. Hooker, among other important blues musicians migrated from his home in Mississippi bringing the Delta blues to northern cities like Detroit. Hooker recorded for Fortune Records, the biggest pre-Motown blues/soul label. During the 1950s, the city became a center for jazz, with stars performing in the Black Bottom neighborhood. Prominent emerging Jazz musicians of the 1960s included: trumpet player Donald Byrd who attended Cass Tech and performed with Art Blakey and the Jazz Messengers early in his career and Saxophonist Pepper Adams who enjoyed a solo career and accompanied Byrd on several albums. The Graystone International Jazz Museum documents jazz in Detroit.
Document 10: Iron Man (Eric Dolphy album): Iron Man is a 1963 album by American jazz multi-instrumentalist, Eric Dolphy, and is the recorded debut of trumpeter Woody Shaw. According to the album cover notes, the recording sessions took place late at night in a very relaxed studio for five successive nights. So much was created, individual compositions went from "almost commercial" to "very far out." Two albums were produced from recordings made that week. The first was called "Conversations" and was released on the FM Records label. "Iron Man" incorporated performances that were considered "too futuristic" for immediate release, but was published in 1968, after Dolphy's death.
Document 11: Eddie Locke: Eddie Locke was a part of the fertile and vibrant Detroit jazz scene during the 1940s and 1950s, which brought forth many great musicians including the Jones brothers (Hank, Thad, and Elvin), Kenny Burrell, Lucky Thompson, Tommy Flanagan, Barry Harris, and so many others. He eventually formed a variety act with drummer Oliver Jackson called Bop & Locke which played the Apollo Theater. He moved to New York City in 1954, and worked there with Dick Wellstood, Tony Parenti, Red Allen, Willie "The Lion" Smith, and Teddy Wilson amongst others. During this time he came under the tutelage of the great Jo Jones, and eventually became known as a driving and swinging drummer who kept solid time and supported the soloist. During the late 1950s he formed two of his most fruitful musical relationships, one with Roy Eldridge, and the other with Coleman Hawkins. His recording debut came with Eldridge in 1959 on "On The Town". He later became a member of the Coleman Hawkins Quartet in the 1960s along with pianist Tommy Flanagan and bassist Major Holley. That group made many fine records including the exquisite album "Today and Now", in 1963. Throughout the 1970s, he played with Roy Eldridge at Jimmy Ryan's in Manhattan, and wound out his career freelancing, as well as teaching youngsters at the Trevor Day School on Manhattan's upper west side.
Document 12: Maurice Simon: A high school classmate of Eric Dolphy (1945-6) Simon appears on an early 1945 Los Angeles recording in a band led by Russell "Illinois" Jacquet and which also included Teddy Edwards, Charles Mingus, Bill Davis and Chico Hamilton.
Document 13: Conversations (Eric Dolphy album): Conversations is a 1963 album by American jazz multi-instrumentalist, Eric Dolphy first released by the FM label and later reissued by Vee-Jay as "The Eric Dolphy Memorial Album" the following year.
Document 14: Sports in California: California currently has 19 major professional sports franchises, far more than any other US state. The San Francisco Bay Area has seven major league teams spread amongst three cities: San Francisco, Oakland and San Jose. The Greater Los Angeles Area has twelve major league teams. San Diego and Sacramento each have one major league team.
Document 15: San Diego: The city had a population of 1,307,402 according to the 2010 census, distributed over a land area of 372.1 square miles (963.7 km2). The urban area of San Diego extends beyond the administrative city limits and had a total population of 2,956,746, making it the third-largest urban area in the state, after that of the Los Angeles metropolitan area and San Francisco metropolitan area. They, along with the Riverside–San Bernardino, form those metropolitan areas in California larger than the San Diego metropolitan area, with a total population of 3,095,313 at the 2010 census.
ground_truth: 3,792,621
sub_queries: Iron Man >> performer Answer: Eric Dolphy
Eric Dolphy >> place of birth Answer: Los Angeles
What is the population of Los Angeles ? Answer: 3,792,621