when patient 85895 received a microbiology test for a urine for the last time during a month before?
select microbiologyevents.charttime from microbiologyevents where microbiologyevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 85895 ) and microbiologyevents.spec_type_desc = 'urine' and datetime(microbiologyevents.charttime,'start of month') = datetime(current_time,'start of month','-1 month') order by microbiologyevents.charttime desc limit 1