was there any microbiological test results for patient 14611's sputum until 08/2104?
select count(*)>0 from microbiologyevents where microbiologyevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 14611 ) and microbiologyevents.spec_type_desc = 'sputum' and strftime('%y-%m',microbiologyevents.charttime) <= '2104-08'