when is the first time that patient 7698 was admitted via transfer from hosp/extram since 1 year ago?
select admissions.admittime from admissions where admissions.subject_id = 7698 and admissions.admission_location = 'transfer from hosp/extram' and datetime(admissions.admittime) >= datetime(current_time,'-1 year') order by admissions.admittime asc limit 1