service_id,date,exception_type 7_merged_740124,20170704,1 7_merged_740127,20180101,1 7_merged_740127,20170904,1 7_merged_740127,20171225,1 7_merged_740127,20171123,1 1_merged_740123,20170704,2 1_merged_740126,20180101,2 1_merged_740126,20170904,2 1_merged_740126,20171225,2 1_merged_740126,20171123,2