when patient 1819 was admitted to the hospital via the phys referral/normal deli for the last time this year?
select admissions.admittime from admissions where admissions.subject_id = 1819 and admissions.admission_location = 'phys referral/normal deli' and datetime(admissions.admittime,'start of year') = datetime(current_time,'start of year','-0 year') order by admissions.admittime desc limit 1