was any kind of organism detected during the last pleural fluid microbiology test performed on patient 27703 a month before?
select count(*)>0 from microbiologyevents where microbiologyevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 27703 ) and microbiologyevents.spec_type_desc = 'pleural fluid' and microbiologyevents.org_name is not null and datetime(microbiologyevents.charttime,'start of month') = datetime(current_time,'start of month','-1 month') order by microbiologyevents.charttime desc limit 1