when was the last time of admission to the hospital that patient 12572 was accepted through the transfer from hosp/extram in a year before?
select admissions.admittime from admissions where admissions.subject_id = 12572 and admissions.admission_location = 'transfer from hosp/extram' and datetime(admissions.admittime,'start of year') = datetime(current_time,'start of year','-1 year') order by admissions.admittime desc limit 1