what is patient 8569's yearly maximum level of alanine aminotransferase (alt) until 5 months ago?
select max(labevents.valuenum) from labevents where labevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 8569 ) and labevents.itemid in ( select d_labitems.itemid from d_labitems where d_labitems.label = 'alanine aminotransferase (alt)' ) and datetime(labevents.charttime) <= datetime(current_time,'-5 month') group by strftime('%y',labevents.charttime)