what was the minimum creatinine, body fluid value for patient 60347 until 08/2104.
select min(labevents.valuenum) from labevents where labevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 60347 ) and labevents.itemid in ( select d_labitems.itemid from d_labitems where d_labitems.label = 'creatinine, body fluid' ) and strftime('%y-%m',labevents.charttime) <= '2104-08'