What's the purpose of the number at the end of each line?
Example:
SNAME All_Tracks
1 1 18 0 0 TALADEGA Alabama_500 Alabama_500 188 event1.tga
event1.tga 500
2 2 29 0 0 ATLANTA Atlanta_500 Atlanta_500 328 event1.tga event1.tga
500
3 3 1 0 0 BOWMAN Bowman_Gray_250 Bowman_Gray_250 250 event1.tga
event1.tga 63
thanks