concessionaire           fa division (s)     gauge  length , km takeover date
0                  ferroexpreso pampeano  roca , sarmiento , mitre     broad         5094    1 nov 1991
1                nuevo central argentino                     mitre     broad         4900   23 dec 1992
2                          ferrosur roca                      roca     broad         3145   11 mar 1993
3  buenos aires al pacifico - san martín                san martín     broad         5690   26 aug 1993
4           mesopotámico general urquiza                   urquiza  standard         2704   22 oct 1993
5                        belgrano cargas                  belgrano     metre         9860   16 nov 1999

Table as JSON:
{"concessionaire":{"0":"ferroexpreso pampeano","1":"nuevo central argentino","2":"ferrosur roca","3":"buenos aires al pacifico - san martín","4":"mesopotámico general urquiza","5":"belgrano cargas"},"fa division (s)":{"0":"roca , sarmiento , mitre","1":"mitre","2":"roca","3":"san martín","4":"urquiza","5":"belgrano"},"gauge":{"0":"broad","1":"broad","2":"broad","3":"broad","4":"standard","5":"metre"},"length , km":{"0":5094,"1":4900,"2":3145,"3":5690,"4":2704,"5":9860},"takeover date":{"0":"1 nov 1991","1":"23 dec 1992","2":"11 mar 1993","3":"26 aug 1993","4":"22 oct 1993","5":"16 nov 1999"}}