when did patient 69761 first come to the hospital this year through the clinic referral/premature?
select admissions.admittime from admissions where admissions.subject_id = 69761 and admissions.admission_location = 'clinic referral/premature' and datetime(admissions.admittime,'start of year') = datetime(current_time,'start of year','-0 year') order by admissions.admittime asc limit 1