Original sentence: Line A is unique within the system in the sense that it uses traditional rail traction as opposed to pneumatic traction as the rest of the lines.Line A was the first metro line that extended into the suburbs of Mexico City outside the Mexican Federal District
Edited sentence: Direction East-Far East.Line A is unique within the system in the sense that it uses traditional rail traction as opposed to pneumatic traction as the rest of the lines (excluding future line 12).Line A was the second metro line that extended into the suburbs of Mexico City outside the Mexican Federal District.Line color purple.Passenger railway length 14.893 km.Rolling stock FM86 trains, made in Mexico in 1986;  FM95A, made in Mexico in 1998 and 1999.Started operations  August 12, 1991: From Pantitlán to La Paz.Stations 10.Total railway length 23.722 km