Question: What is the population of the city that has the airport that Schwarzenegger's jet was forced to make an 2009 emergency landing at?

full_context: Document 1: TWC Aviation, Inc.: TWC Aviation, Inc., now owned by Landmark Aviation, is an international business aviation company with operations centers at San Jose International Airport, in San Jose, California, Van Nuys Airport in Los Angeles, and Westchester County Airport, in White Plains, New York.
Document 2: 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 3: Airport: Most of the world's airports are owned by local, regional, or national government bodies who then lease the airport to private corporations who oversee the airport's operation. For example, in the United Kingdom the state-owned British Airports Authority originally operated eight of the nation's major commercial airports - it was subsequently privatized in the late 1980s, and following its takeover by the Spanish Ferrovial consortium in 2006, has been further divested and downsized to operating just five. Germany's Frankfurt Airport is managed by the quasi-private firm Fraport. While in India GMR Group operates, through joint ventures, Indira Gandhi International Airport and Rajiv Gandhi International Airport. Bengaluru International Airport and Chhatrapati Shivaji International Airport are controlled by GVK Group. The rest of India's airports are managed by the Airports Authority of India.
Document 4: Arnold Schwarzenegger: Arnold Alois Schwarzenegger (/ˈʃwɔːrtsənˌɛɡər/; German: [ˈaɐ̯nɔlt ˈalɔʏs ˈʃvaɐ̯tsn̩ˌɛɡɐ]; born July 30, 1947) is an Austrian-American actor, filmmaker, businessman, investor, author, philanthropist, activist, former professional bodybuilder and politician. He served two terms as the 38th Governor of California from 2003 until 2011.
Document 5: Arnold Schwarzenegger: Arnold Alois Schwarzenegger (/ ˈʃvɑːrtsənɛɡər /; German: (ˈaɐ̯nɔlt ˈʃvaɐ̯tsn̩ˌʔɛɡɐ); born July 30, 1947) is an Austrian - American actor, filmmaker, businessman, investor, author, philanthropist, activist, politician, and former professional bodybuilder. He served two terms as the 38th Governor of California from 2003 to 2011.
Document 6: Southern California: Six of the seven lines of the commuter rail system, Metrolink, run out of Downtown Los Angeles, connecting Los Angeles, Ventura, San Bernardino, Riverside, Orange, and San Diego counties with the other line connecting San Bernardino, Riverside, and Orange counties directly.
Document 7: Arnold Schwarzenegger: Schwarzenegger served in the Austrian Army in 1965 to fulfill the one year of service required at the time of all 18-year-old Austrian males. During his army service, he won the Junior Mr. Europe contest. He went AWOL during basic training so he could take part in the competition and spent a week in military prison: "Participating in the competition meant so much to me that I didn't carefully think through the consequences." He won another bodybuilding contest in Graz, at Steirer Hof Hotel (where he had placed second). He was voted best built man of Europe, which made him famous. "The Mr. Universe title was my ticket to America – the land of opportunity, where I could become a star and get rich." Schwarzenegger made his first plane trip in 1966, attending the NABBA Mr. Universe competition in London. He would come in second in the Mr. Universe competition, not having the muscle definition of American winner Chester Yorton.
Document 8: Avianca Costa Rica: Avianca Costa Rica, formerly known as "LACSA" ("Spanish: Lineas Aéreas Costarricenses S.A."), minority owned by the Synergy Group, is the national airline of Costa Rica and is based in San José. It operates international scheduled services to over 35 destinations in Central, North and South America. The airline previously used the TACA/LACSA moniker when it was a subsidiary of Grupo TACA. Since May 2013, following Avianca's purchase of Grupo TACA, Avianca Costa Rica became one of seven nationally branded airlines (Avianca Ecuador, Avianca Honduras, etc.) operated by Avianca Holdings group of Latin American airlines.
Document 9: 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 10: Transwestern Airlines: Transwestern Airlines was a regional airline based in Logan, Utah, its hub was at the Logan-Cache Airport. Founded in 1976, it was later acquired by Horizon Air in 1983.
Document 11: Arnold Schwarzenegger: Schwarzenegger's private jet made an emergency landing at Van Nuys Airport on June 19, 2009, after the pilot reported smoke coming from the cockpit, according to a statement released by the governor's press secretary. No one was harmed in the incident.
Document 12: 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.
Document 13: 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 14: 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 15: US Airways Flight 1549: US Airways Flight 1549 was an Airbus A320 - 214 which, in the climbout after takeoff from New York City's LaGuardia Airport on January 15, 2009, struck a flock of Canada geese just northeast of the George Washington Bridge and consequently lost all engine power. Unable to reach any airport, pilots Chesley Sullenberger and Jeffrey Skiles glided the plane to a ditching in the Hudson River off Midtown Manhattan. All 155 people aboard were rescued by nearby boats and there were few serious injuries.
ground_truth: 3,792,621
sub_queries: At what airport was Schwarzenegger's jet forced to make an emergency landing in 2009? Answer: Van Nuys Airport
Van Nuys Airport >> located in the administrative territorial entity Answer: Los Angeles
What is the population of Los Angeles ? Answer: 3,792,621