Information:  - Incheon International Airport Station is a railway station on AREX . It is in Incheon International Airport 's transport center and currently the terminus . Since June 2014 , KTX operates from this station with stops at Geomam Station and Seoul Station towards Busan and Gwangju . In the same year , KTX expanded service to Incheon Airport . It offers a transfer with the Incheon Airport Maglev . AREX has 11 stations and it also divided into two lines , one is normal and the other is express . For the normal line , the train will stop in every single station . In others , the express line will only stop in Incheon International Airport Station and Seoul Station . Fare : Direct train : 8,000 won / adult , 6,900 won / kids ( the original full fare was 14,300 won but was reduced to encourage usage ) we can use train with that fare . Normal train : it depend on the distance , but from Seoul Station to Incheon International Airport Station is 3,950 won .  - Gwangju is the sixth largest city in South Korea. It is a designated metropolitan city under the direct control of the central government's Home Minister. The city was also the capital of South Jeolla Province until the provincial office moved to the southern village of Namak in Muan County in 2005.  - Busan;, officially Busan Metropolitan City(), romanized as Pusan before 2000, is South Korea's second most-populous city after Seoul, with a population of approximately 3.6 million. The population of the metropolitan area, including the adjacent cities of Gimhae and Yangsan, is approximately 4.6 million. The city is located on the southeastern-most tip of the Korean peninsula.  - AREX(Airport Railroad Express), spelled "A'REX" as a brand name, is a South Korean commuter rail line that links Seoul with Gimpo Airport and Incheon International Airport. The section between the two airports opened on March 23, 2007, the extension to Seoul Station opened December 29, 2010.  - Incheon Subway Line 2 is a 27 station subway line from Oryu-dong in Seo-gu to Incheon Grand Park., part of the Incheon Subway system. The line is also included as a part of the overall Seoul Metropolitan Subway network; Juan Station has a free transfer with Seoul Subway Line 1, Geomam Station connects with the AREX Line to Incheon International Airport and Seoul Station, and Seongnam will eventually have a free transfer with Seoul Subway Line 7.  - Seoul ()  officially the Seoul Special City  is the capital and largest metropolis of the Republic of Korea (commonly known as South Korea), forming the heart of the Seoul Capital Area, which includes the surrounding Incheon metropolis and Gyeonggi province, the world's 16th largest city. It is home to over half of all South Koreans along with 678,102 international residents.  - Muan County ("Muan-gun") is a county in South Jeolla Province ("Jeollanam-do"), South Korea. In 2005, Muan County became the capital of "Jeollanam-do" following the transfer of the provincial office from its previous location, Gwangju to the village of Namak in Muan. Muan International Airport was opened here, and will eventually replace the airports in Gwangju and Mokpo.  - Seoul Station is a major railway station in Seoul, the capital of South Korea. The station is served by the Gyeongbu Line, its high-speed counterpart and the Gyeongui Line, with frequent high-speed, express, and local services to various points in South Korea. Line 1 and Line 4's official station name is Seoul Station's Station.  - Geomam Station is a railway station on AREX and Incheon Subway Line 2. Since June 2014, the KTX train operates from Incheon International Airport to Busan or Mokpo. This is the first KTX station after Incheon Airport. Before KTX started to run on AREX, all platforms were high-leveled with screen doors. The KTX started to run, they took away the platform screen doors only at the both end of the side horizontally and turned into low-leveled platform without screen doors.  - Incheon International Airport (IIA) (sometimes referred to as SeoulIncheon International Airport) is the largest airport in South Korea, the primary airport serving the Seoul Capital Area, and one of the largest and busiest airports in the world. Since 2005, it has been rated the best airport worldwide by Airports Council International every year. It is also rated as the world's cleanest airport and the world's best international transit airport by Skytrax.  - The Gyeongbu Line ("Gyeongbuseon") is the most important railway line in South Korea and one of the oldest. Constructed in 1905, connecting Seoul to Suwon, Daejeon, Daegu, and Busan. The Gyeongbu Line is by far the most heavily travelled rail line in South Korea. High-speed, express, local, and freight trains provide frequent service along its entire length.  - Commuter rail, also called suburban rail, is a passenger rail transport service that primarily operates between a city centre, and the middle to outer suburbs beyond 15 km (10 miles) and commuter towns or other locations that draw large numbers of commuterspeople who travel on a daily basis. Trains operate following a schedule, at speeds varying from 50 to 200 km/h (30 to 125 mph). Distance charges or zone pricing may be used.  - Incheon (formerly romanized as Inchon; literally "kind river"), officially the Incheon Metropolitan City(), is a city located in northwestern South Korea, bordering Seoul and Gyeonggi to the east. Inhabited since the New Stone Age, Incheon was home to just 4,700 people when it became an international port in 1883. Today, about 3 million people live in the city, making it Koreas third most populous city after Seoul and Busan. The city's growth has been assured in modern times with the development of its port due to its natural advantages as a coastal city and its proximity to the South Korean capital. It is part of the Seoul Capital Area, along with Seoul itself and Gyeonggi Province, forming the world's second largest metropolitan area by population.    After reading the paragraphs above, we are interested in knowing the entity with which 'incheon international airport station' exhibits the relationship of 'inception'. Find the answer from the choices below.  Choices: - 1  - 10  - 125  - 15  - 1905  - 2  - 200  - 2000  - 2005  - 2007  - 30  - 4  - 50  - 678  - june 2014
The answer to this question is:
2007