This is the 18694th most frequent Korean word.
신안산선은
"신안산선은" translates to "Shin Ansan Line," referring to a commuter rail line in South Korea.
Here, 신안산선은 is used as the subject, specifying the proper noun referring to a train line.
신안산선은 수도권 전철의 노선 중 하나입니다.
Shinansan Line is one of the metropolitan train lines.
In this sentence, 신안산선은 serves as the subject to discuss its societal impact.
신안산선은 교통 정체를 줄이는 데 큰 도움이 됩니다.
Shinansan Line greatly helps in reducing traffic congestion.
Here, 신안산선은 is used as the subject to indicate its expected timeline for completion.