Question: What is the name of the airport in the region that encompasses District 9?

full_context: Document 1: Lycée International Georges Duby: Lycée International Georges Duby is a non fee-paying state high school in southern France, which prepares students for the French Baccalauréat. Students in the main section of the Lycée are drawn from the residential areas of the southern suburbs of Aix-en-Provence.
Document 2: Houston: The primary city airport is George Bush Intercontinental Airport (IAH), the tenth-busiest in the United States for total passengers, and twenty eighth-busiest worldwide. Bush Intercontinental currently ranks fourth in the United States for non-stop domestic and international service with 182 destinations. In 2006, the United States Department of Transportation named IAH the fastest-growing of the top ten airports in the United States. The Houston Air Route Traffic Control Center stands on the George Bush Intercontinental Airport grounds.
Document 3: Tan Son Nhat International Airport: Tân Sơn Nhất International Airport (IATA: SGN, ICAO: VVTS) (Vietnamese: Sân bay quốc tế Tân Sơn Nhất, Vietnamese: Cảng hàng không quốc tế Tân Sơn Nhất) is the busiest airport in Vietnam with 32.5 million passengers in 2016, serving Ho Chi Minh City as well as the rest of southeastern Vietnam. As of January 2017, it had a total capacity of only 25 million passengers, which has caused constant congestion and sparked debate for expanding or building a new airport. The airport's IATA code, SGN, is derived from the city's former name of Saigon.
Document 4: Ho Chi Minh City: Ho Chi Minh City Thành phố Hồ Chí Minh Saigon or Sài Gòn Municipality Thành phố trực thuộc trung ương Clockwise, from left to right: Bến Thành Market, Ho Chi Minh City Hall, District 1 view from Saigon river, Municipal Theatre, Notre - Dame Cathedral Basilica of Saigon, Independence Palace Seal Nickname (s): Pearl of the Far East Location in Vietnam and Southern Vietnam Coordinates: 10 ° 46 ′ 36.8 ''N 106 ° 42 ′ 02.9'' E ﻿ / ﻿ 10.776889 ° N 106.700806 ° E ﻿ / 10.776889; 106.700806 Coordinates: 10 ° 46 ′ 36.8 ''N 106 ° 42 ′ 02.9'' E ﻿ / ﻿ 10.776889 ° N 106.700806 ° E ﻿ / 10.776889; 106.700806 Country Vietnam Central district District 1 Founded as Gia Định 1698 Renamed to Ho Chi Minh City 1976 Founded by Nguyễn Hữu Cảnh Divisions 19 Urban districts, 5 Suburban districts Government Type Special - class Secretary of Communist Party Nguyễn Thiện Nhân Chairman of People's Committee Nguyễn Thành Phong Chairman of People's Council Nguyễn Thị Quyết Tâm Area Total 2,096.56 km (809.23 sq mi) Elevation 19 m (63 ft) Population (2016) Total 8,426,100 Rank 1st Density 4,000 / km (10,000 / sq mi) GDP (PPP) (2015 estimate) Total US $127.8 billion Per capita US $15,977 GRDP (nominal) (2016) Total US $45.73 billion Per capita US $5,428 Time zone ICT (UTC + 07: 00) Area codes 8 (until 16 Jul 2017) 28 (from 17 Jun 2017) Website hochiminhcity.gov.vn
Document 5: Chu Văn An High School (Ho Chi Minh City): Chu Van An High School is a high school in Sai Gon, Vietnam. The school is located at the intersection of Ngo Gia Tu Blvd. (formerly Minh Mang Blvd.) and Ngo Quyen St. (formerly Trieu Da St.), District 5, Ho Chi Minh City. Originally, the school was founded by teachers and students of Buoi High School who moved to Saigon from the north following the 1954 Geneva Conference. After a time of operation under the sponsorship of Petrus Ky High School, these people built a new high school at Minh Mang St. in 1961 and named it after Chu Van An, a famous Vietnamese Confucianism teacher of Tran Dynasty. After the end of the Vietnam War in 1975, the school continued operating under this name. In 1978, the school was dissolved and its students were transferred into nearby high schools. The school's building was transferred to a new school named Huấn Nghệ Phổ thông Lao động School ("Training of General Labor Skills School"). Later, the school was revived by the end of the 1990s under a new education program.
Document 6: Sagesse High School: Sagesse High School, Mary Mother of Wisdom is a private, Catholic co-educational school located in the suburb of Ain Saadeh, Matn District, Lebanon (30 minute drive from Beirut Rafic Hariri International Airport). Sagesse High School operates under the supervision of the General Secretariat of Catholic Schools in Lebanon as well as being a member of the La Sagesse institution of the archdiocese of Beirut, and is internationally accredited by the Middle States Association of Colleges and Schools as of 2009. Sagesse High School is also the first IB World School in the country, offering the International Baccalaureate since 1995.
Document 7: Mumbai: The Chhatrapati Shivaji International Airport (formerly Sahar International Airport) is the main aviation hub in the city and the second busiest airport in India in terms of passenger traffic. It handled 36.6 million passengers and 694,300 tonnes of cargo during FY 2014–2015. An upgrade plan was initiated in 2006, targeted at increasing the capacity of the airport to handle up to 40 million passengers annually and the new terminal T2 was opened in February 2014.The proposed Navi Mumbai International airport to be built in the Kopra-Panvel area has been sanctioned by the Indian Government and will help relieve the increasing traffic burden on the existing airport.The Juhu Aerodrome was India's first airport, and now hosts the Bombay Flying Club and a heliport operated by state-owned Pawan Hans.
Document 8: Lycée Français International Marguerite Duras: Lycée Français International Marguerite Duras is a French international school in Long Binh, District 9, Ho Chi Minh City (Saigon). It is about 40 minutes from the centre of the city. It covers "maternelle", through the final year of "lycée" (senior high school).
Document 9: Paris: The Paris region hosts France's highest concentration of the grandes écoles – 55 specialised centres of higher-education outside the public university structure. The prestigious public universities are usually considered grands établissements. Most of the grandes écoles were relocated to the suburbs of Paris in the 1960s and 1970s, in new campuses much larger than the old campuses within the crowded city of Paris, though the École Normale Supérieure has remained on rue d'Ulm in the 5th arrondissement. There are a high number of engineering schools, led by the Paris Institute of Technology which comprises several colleges such as École Polytechnique, École des Mines, AgroParisTech, Télécom Paris, Arts et Métiers, and École des Ponts et Chaussées. There are also many business schools, including HEC, INSEAD, ESSEC, and ESCP Europe. The administrative school such as ENA has been relocated to Strasbourg, the political science school Sciences-Po is still located in Paris' 7th arrondissement and the most prestigious university of economics and finance, Paris-Dauphine, is located in Paris' 16th. The Parisian school of journalism CELSA department of the Paris-Sorbonne University is located in Neuilly-sur-Seine. Paris is also home to several of France's most famous high-schools such as Lycée Louis-le-Grand, Lycée Henri-IV, Lycée Janson de Sailly and Lycée Condorcet. The National Institute of Sport and Physical Education, located in the 12th arrondissement, is both a physical education institute and high-level training centre for elite athletes.
Document 10: Vietnam Airlines: While the airline had launched flights to London-Gatwick, Beijing and Shanghai, as of April 2018 there are no flights to Mumbai, Doha, and Brisbane. The airline also plans to re-open flights to Berlin, and commence flights to Adelaide, Perth, Amsterdam, Milan, Prague, Mandalay, Dalian, Nanjing, Hangzhou and African cities; by 2020, Vietnam Airlines is expected to serve 53 international destinations, up from 27 in 2011. By 2020, Vietnam Airlines plans to increase its annual revenue to US$7 billion – up from $1.86 billion in 2010 – by carrying 620,000 tonnes of cargo and 35 million passengers, using a fleet of 163 aircraft (later revised to 41 million passengers using 170 aircraft). It aims to capture a 45% market share of Vietnam's aviation market. During its first 15 years of operation, from 1996 to 2010, Vietnam Airlines carried a total of 82 million passengers on 678,550 flights. In addition, Vietnam Airlines plans to transfer most of its international operations from its current hub, Tan Son Nhat International Airport, to the proposed Long Thanh International Airport. With a cost of approximately US$6 billion, the airport will, according to Vietnamese authorities, help Vietnam Airlines boost its operations internationally as it seeks to bypass Thailand as the dominant gateway to the Greater Mekong region. London operations were transferred from Gatwick to Heathrow in 2015; the airline plans to operate its new Boeing 787-9 aircraft to this destination, starting from .
Document 11: Ho Chi Minh City University of Foreign Languages and Information Technology: Ho Chi Minh City University of Foreign Languages and Information Technology ("abbreviation": HUFLIT) is a university located at 155 Su Van Hanh, District 10, Ho Chi Minh City, Vietnam. Date of foundation: October 26, 1994, according to Decision No. 616/Ttg by the Prime Minister of the Socialist Republic of Vietnam. HUFLIT is the first private University in Ho Chi Minh City and South Vietnam on the basis of former Saigon Foreign Languages and Information Technology School which is established in 1992.
Document 12: Lycée Albert Sarraut: Lycée Albert Sarraut was a French lyceum in Hanoi, Vietnam, during the French colonial period, active from 1919 to 1965. It was one of 69 high schools founded by the French in their colonies worldwide, named for Albert Sarraut. The school offered high standard academic programs for students between the ages of 11 and 18.
Document 13: New Delhi: Indira Gandhi International Airport, situated to the southwest of Delhi, is the main gateway for the city's domestic and international civilian air traffic. In 2012-13, the airport was used by more than 35 million passengers, making it one of the busiest airports in South Asia. Terminal 3, which cost ₹96.8 billion (US$1.4 billion) to construct between 2007 and 2010, handles an additional 37 million passengers annually.
Document 14: Saigon Bridge: Saigon Bridge, known as Newport Bridge () before 1975, is a bridge crossing the Saigon River, connecting Bình Thạnh District and District 2, Ho Chi Minh City, on the Hanoi Highway. The bridge has four lanes for cars and two lanes for motorcycles and bicycles. It was the only bridge linking District 1 to the new Thu Thiem New Urban Area in District 2 until the Thủ Thiêm Bridge opened in 2008 and the Saigon River Tunnel opened in 2011. The bridge was one of the most vital gateways for vehicles traveling from northern and central Vietnam to the city, and therefore was a key point of contention during the Tet Offensive in 1968 and the Fall of Saigon in 1975. In 2013, a new parallel bridge, Saigon 2 Bridge, was opened to ease congestion on the bridge.
Document 15: Seoul: Incheon International Airport, opened in March 2001 in Yeongjong island, is now responsible for major international flights. Incheon International Airport is Asia's eighth busiest airport in terms of passengers, the world's fourth busiest airport by cargo traffic, and the world's eighth busiest airport in terms of international passengers in 2014. In 2016, 57,765,397 passengers used the airport.
ground_truth: Tân Sơn Nhất International Airport
sub_queries: District 9 >> located in the administrative territorial entity Answer: Ho Chi Minh City
what is the name of the airport in Ho Chi Minh City Answer: Tân Sơn Nhất International Airport