Given the question: Information: - Byeollae Station is a railway station on the Gyeongchun Line that opened in April 2013 . Seoul Subway Line 8 is being extended to this station with an estimated opening date in 2022 . - Seoul Metropolitan Rapid Transit Corporation (SMRT) was established in 1994 to operate the Seoul Subway lines 5, 6, 7, 8 in Seoul, South Korea. - Chuncheon Station is a railway station on, and the eastern terminus of, the Gyeongchun Line. It was opened in 1939 as a regular train station and became a subway stop in 2010. - The Gyeongchun Line is a regional rail line between Seoul and Chuncheon operated by Korail. The name of the line is derived from Gyeong (meaning the capital, Seoul) and "Chuncheon". The line was reconstructed in a new alignment in its entirety in the 2000s. Rail service operates between Sangbong Station on the Jungang Line in eastern Seoul and Chuncheon Station as part of the Seoul Metropolitan Subway system since December 21, 2010. A class of regional rail service named ITX-Cheongchun began operations on February 28, 2012, linking Chuncheon to Cheongnyangni and Yongsan Stations. - Sangbong Station is a station on the Seoul Subway Line 7. As of December 21, 2010, this station now has a dual transfer point with the GyeonguiJungang Line and Gyeongchun Line, with the platform of the aboveground station. - Seoul Subway Line 8 of the Seoul Metropolitan Rapid Transit Corporation was built 1990-99 and mainly serves the southeastern parts of Seoul and Seongnam. Moran to Amsa was opened July 1999. Its color is rose. - 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. - The Seoul Metropolitan Subway is an integrated urban rail transit system consisting of 20 rapid transit, light metro, commuter rail and people mover lines located in South Korea. The system serves most of the Seoul Metropolitan Area including the Incheon metropolis and satellite cities in Gyeonggi province. Some lines in the network cross large rural areas to reach major cities in northern Chungnam province and western Gangwon province that lie over 100km away from the capital. 'byeollae station' is related to which object entity through the relation of 'inception'? Choices: - 1939 - 1990 - 1994 - 20 - 2010 - 2012 - 678 - 7 - 8 - july 1999
The answer is:
2012