service_id,date,exception_type WHT 16_17-1_WHT-Weekday-01,20170414,2 WHT 16_17-1_WHT-Weekday-01,20170417,2 WHT 16_17-1_WHT-Weekday-01,20170425,2 WHT 16_17-1_WHT-Weekday-01,20170501,2 WHT 16_17-1_WHT-Sunday-01,20170414,1 WHT 16_17-1_WHT-Sunday-01,20170417,1 WHT 16_17-1_WHT-Sunday-01,20170425,1 WHT 16_17-1_WHT-Sunday-01,20170501,1