when did patient 7476 come to the hospital via emergency room admit, the last time during the previous year?
select admissions.admittime from admissions where admissions.subject_id = 7476 and admissions.admission_location = 'emergency room admit' and datetime(admissions.admittime,'start of year') = datetime(current_time,'start of year','-1 year') order by admissions.admittime desc limit 1