is there any history of microbiology test results for patient 61751's bile during the last month?
select count(*)>0 from microbiologyevents where microbiologyevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 61751 ) and microbiologyevents.spec_type_desc = 'bile' and datetime(microbiologyevents.charttime,'start of month') = datetime(current_time,'start of month','-1 month')