column_number,name,first_trace_number,last_trace_number
1,22773,1,217846
2,22773,1,213735
2,none,213736,217846
3,22773,1,86937
3,none,86938,213735
3,none,213736,217846
4,22773,1,77173
4,none,77174,86937
4,none,86938,217846
5,22773,1,33939
5,none,33940,77173
5,none,77174,217846