prr class      builders model   build date  total produced wheel arrangement   service  power output
0        bs6            vo - 660  1942 - 1945              12             b - b  switcher           NaN
1        bs6    ds - 4 - 4 - 660  1942 - 1945              99             b - b  switcher           NaN
2        bs7    ds - 4 - 4 - 750         1951              24             b - b  switcher           NaN
3        bs7                  s7         1951               7             b - b  switcher           NaN
4       bs10                  vo  1943 - 1945               8             b - b  switcher           NaN
5       bs10   ds - 4 - 4 - 1000  1948 - 1950             137             b - b  switcher           NaN
6       bs12              s - 12  1951 - 1956              98             b - b  switcher           NaN
7       bf15   dr - 4 - 4 - 1500  1940 - 1950              34             b - b   freight           NaN
8       bf16         rf - 16 (a)  1950 - 1952              72             b - b   freight           NaN
9       bf16         rf - 16 (b)  1950 - 1952              30             b - b   freight           NaN
10     bp60a  dr - 12 - 8 - 3000  1947 - 1948              24     2 - d - d - 2      pass           NaN
11      bp20   dr - 6 - 4 - 2000         1948              18         a1a - a1a      pass           NaN
12      bp20   dr - 6 - 4 - 2000         1948               9         a1a - a1a      pass           NaN
13     brs10  drs - 4 - 4 - 1000  1949 - 1950               6             b - b      pass           NaN
14     brs12             rs - 12  1951 - 1954               8             b - b      pass           NaN
15     brs15  drs - 4 - 4 - 1500         1950               8             b - b      pass           NaN
16     brs16             as - 16  1953 - 1955              28             c - c      pass           NaN
17     brs24            rt - 624  1951 - 1954              22             c - c  transfer           NaN
18     lrs25               t2500  1950 - 1951              22             c - c  transfer           NaN

Table as JSON:
{"prr class":{"0":"bs6","1":"bs6","2":"bs7","3":"bs7","4":"bs10","5":"bs10","6":"bs12","7":"bf15","8":"bf16","9":"bf16","10":"bp60a","11":"bp20","12":"bp20","13":"brs10","14":"brs12","15":"brs15","16":"brs16","17":"brs24","18":"lrs25"},"builders model":{"0":"vo - 660","1":"ds - 4 - 4 - 660","2":"ds - 4 - 4 - 750","3":"s7","4":"vo","5":"ds - 4 - 4 - 1000","6":"s - 12","7":"dr - 4 - 4 - 1500","8":"rf - 16 (a)","9":"rf - 16 (b)","10":"dr - 12 - 8 - 3000","11":"dr - 6 - 4 - 2000","12":"dr - 6 - 4 - 2000","13":"drs - 4 - 4 - 1000","14":"rs - 12","15":"drs - 4 - 4 - 1500","16":"as - 16","17":"rt - 624","18":"t2500"},"build date":{"0":"1942 - 1945","1":"1942 - 1945","2":"1951","3":"1951","4":"1943 - 1945","5":"1948 - 1950","6":"1951 - 1956","7":"1940 - 1950","8":"1950 - 1952","9":"1950 - 1952","10":"1947 - 1948","11":"1948","12":"1948","13":"1949 - 1950","14":"1951 - 1954","15":"1950","16":"1953 - 1955","17":"1951 - 1954","18":"1950 - 1951"},"total produced":{"0":12,"1":99,"2":24,"3":7,"4":8,"5":137,"6":98,"7":34,"8":72,"9":30,"10":24,"11":18,"12":9,"13":6,"14":8,"15":8,"16":28,"17":22,"18":22},"wheel arrangement":{"0":"b - b","1":"b - b","2":"b - b","3":"b - b","4":"b - b","5":"b - b","6":"b - b","7":"b - b","8":"b - b","9":"b - b","10":"2 - d - d - 2","11":"a1a - a1a","12":"a1a - a1a","13":"b - b","14":"b - b","15":"b - b","16":"c - c","17":"c - c","18":"c - c"},"service":{"0":"switcher","1":"switcher","2":"switcher","3":"switcher","4":"switcher","5":"switcher","6":"switcher","7":"freight","8":"freight","9":"freight","10":"pass","11":"pass","12":"pass","13":"pass","14":"pass","15":"pass","16":"pass","17":"transfer","18":"transfer"},"power output":{"0":null,"1":null,"2":null,"3":null,"4":null,"5":null,"6":null,"7":null,"8":null,"9":null,"10":null,"11":null,"12":null,"13":null,"14":null,"15":null,"16":null,"17":null,"18":null}}