"1907Z"^^ . . . "28"^^ . "Market\u2013Frankford Line"@en . . . "191308"^^ . "Operational" . . "20760.5"^^ . "1907-03-04Z"^^ . . . . . . "2"^^ . . "The Market\u2013Frankford Line (MFL) (also called the Market\u2013Frankford Subway\u2013Elevated Line (MFSE), Market-Frankford El (MFE), the El, or Blue Line) is a rapid transit line in Philadelphia. It is operated by the Southeastern Pennsylvania Transportation Authority (SEPTA)."@en . .