. "40400.0"^^ . . "31700.0"^^ . . "72100.0"^^ . "Seoul Subway Line 4 (dubbed The Blue Line) of the Seoul Metropolitan Subway is a long line crossing from the southwest to the northeast across the Seoul National Capital Area. This is operated by both Korail and Seoul Metro."@en . "26"^^ . . "1985-04-20Z"^^ . . "Operational" . "48"^^ . . "22"^^ . "1985Z"^^ . . "2"^^ . "Line 4"@en .