when did patient 65582 get in the first hospital encounter a lab test for the first time?
select labevents.charttime from labevents where labevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 65582 and admissions.dischtime is not null order by admissions.admittime asc limit 1 ) order by labevents.charttime asc limit 1