until 2104, when did patient 86206 come to the hospital via the phys referral/normal deli for the first time?
select admissions.admittime from admissions where admissions.subject_id = 86206 and admissions.admission_location = 'phys referral/normal deli' and strftime('%y',admissions.admittime) <= '2104' order by admissions.admittime asc limit 1