. "97" . "1974" . . . "1" . . "'''Line 1'''" . . "200600.0" . . "one" . "1974-08-15" . "192800.0" . . "87" . "1 (Blue Line)" . "Operational" . . "Line 4" . "lines 1" . . "subway line 1" . "line 1" . . . . "Seoul Subway Line 1" . "a part of Line 1" . . . . . "first line" . "Line 1" . . "110.0" . "Lines 1" . . . . "7800.0" . . "Seoul Subway Line 1" . "Underground Line 1" .