Question: Where was the airline which has Gimhae International Airport  as the main hub based? 

Context paragraphs:
Haeundae Beach: Haeundae Beach () is a beach in Busan, South Korea.  Haeundae beach is 40 minutes away from Busan's main railroad station (in the Downtown area), and less than one hour from Gimhae International Airport.  Along the 12 km of coastline is Busan's most popular beach, and with Seogwipo's, it is one of the most famous beaches in South Korea.  Because of its easy access from downtown Busan, the beach is busy year round with several kinds of beach festivals.  Most visitors are domestic.  Recently, the numbers of foreign visitors also have been increasing.  Dongbaekseom (Dongbaek Island), at the south end of the beach, is a popular fishing area.  Oryukdo (Oryuk Islets), a symbol of Busan to many Koreans, can be seen in the distance from Dongbaek Island.  During the hot summer months (late July to early August when most Koreans take their summer vacation), Haeundae beach becomes heavily crowded into a virtual human wall with thousands of people and parasols packed into a mile of sand.  Visitors to the beach come from all over South Korea as well as outside of Korea.  Haeundae is home to most of Busan's expatriate population.

Air Busan: Air Busan Co., Ltd., operating as Air Busan () is a low-cost airline based in Busanjin-gu, Busan, Republic of Korea.  It is a subsidiary of Asiana Airlines.  The airline began its operation in 2007 as Busan International Airlines Company (); it launched service on October 2008.

Air China Flight 129: Air China Flight 129 (CCA129/CA129) was a scheduled international passenger flight, operated by People's Republic of China's flag carrier Air China, from Beijing Capital International Airport, Beijing, People's Republic of China to Gimhae International Airport, Busan, South Korea.  On April 15, 2002, the jet on this route, a Boeing 767-200ER, crashed into a hill near Busan, killing 129 of the 166 people on board.

Gimhae International Airport: Gimhae International Airport (formerly Kimhae International Airport) (IATA: PUS, ICAO: RKPK) is located on the western end of Busan, South Korea.  It opened in 1976.  A new international terminal opened on October 31, 2007.  Gimhae International Airport is the main hub for Air Busan.  Runway 18L/36R is used for military purposes only for Gimhae Air Base, but due to increasing traffic, there are plans to open the runway for airliners.  In 2016, 14,900,815 passengers used the airport.

Yeongnam Air: Yeongnam Air () was a small regional airline of South Korea launched on 25 July 2008.  Its main base was Gimhae International Airport and Daegu International Airport.  It flew to Jeju International Airport and Gimpo Airport with a single aircraft.

AirAsia: AirAsia Berhad () is a Malaysian low-cost airline headquartered near Kuala Lumpur, Malaysia.  It is the largest airline in Malaysia by fleet size and destinations.  AirAsia Group operates scheduled domestic and international flights to more than 165 destinations spanning 25 countries.  Its main hub is klia2, the low-cost carrier terminal at Kuala Lumpur International Airport (KLIA) in Sepang, Selangor, Malaysia.  Its affiliate airlines Thai AirAsia, Indonesia AirAsia, Philippines AirAsia, and AirAsia India have hubs in Don Mueang International Airport, Soekarno–Hatta International Airport, Ninoy Aquino International Airport, and Kempegowda International Airport respectively, while its sister airline, AirAsia X, focuses on long-haul routes.  AirAsia's registered office is in Petaling Jaya, Selangor while its head office is at Kuala Lumpur International Airport.

Jet Airways: Jet Airways (Hindi: जेट एयरवेज , "Jet Eyaravej") is a major Indian international airline based in Mumbai.  In July 2017, it was the second largest airline in India after IndiGo with an 18.2% passenger market share.  It operates over 300 flights daily to 68 destinations worldwide from its main hub at Chhatrapati Shivaji International Airport and secondary hubs at Amsterdam Airport Schiphol, Chennai International Airport, Indira Gandhi International Airport, Kempegowda International Airport and Netaji Subhas Chandra Bose International Airport.

Olympic Air: Olympic Air S.A. (Greek: Ολυμπιακή ) is a regional airline, a subsidiary of the Greek airline carrier Aegean Airlines.  It was initially formed from the privatization of the former Greek national carrier Olympic Airlines, a company that carried the name Olympic Airways from 1957 to the beginning of the 21st century.  Olympic Air commenced limited operations on 29 September 2009, after Olympic Airlines ceased all operations, with the official full-scale opening of the company taking place two days later on 1 October 2009.  Its main hub is Athens International Airport, with Rhodes International Airport serving as secondary hub.  The airline's headquarters are in Building 57 at Athens International Airport in Spata, and its registered seat is in Koropi, Kropia, East Attica.

2001 Japan Airlines mid-air incident: On January 31, 2001, Japan Airlines Flight 907, a Boeing 747-400 en route from Haneda Airport, Japan, to Naha Airport, Okinawa, narrowly avoided a mid-air collision with Flight 958, a McDonnell Douglas DC-10-40 en route from Gimhae International Airport, South Korea, to Narita International Airport, Japan.  The event became known in Japan as the Japan Airlines near miss incident above Suruga Bay (日本航空機駿河湾上空ニアミス事故 , "Nihonkōkūki surugawan jōkū niamisu jiko" ) .

Gimhae Air Base: Gimhae Air Base (IATA: PUS, ICAO: RKPK) is a Republic of Korea Air Force (ROKAF) base adjacent to Gimhae International Airport.  Runway 18L/36R is used for military purposes only.

Supporting paragraphs: Gimhae International Airport Air Busan
Answer: Busanjin-gu, Busan