when was the first time patient 12718 was prescribed insulin human regular with metoprolol succinate xl at the same time since 102 months ago?
select t1.startdate from ( select admissions.subject_id, prescriptions.startdate from prescriptions join admissions on prescriptions.hadm_id = admissions.hadm_id where prescriptions.drug = 'insulin human regular' and admissions.subject_id = 12718 and datetime(prescriptions.startdate) >= datetime(current_time,'-102 month') ) as t1 join ( select admissions.subject_id, prescriptions.startdate from prescriptions join admissions on prescriptions.hadm_id = admissions.hadm_id where prescriptions.drug = 'metoprolol succinate xl' and admissions.subject_id = 12718 and datetime(prescriptions.startdate) >= datetime(current_time,'-102 month') ) as t2 on t1.subject_id = t2.subject_id where datetime(t1.startdate) = datetime(t2.startdate) order by t1.startdate asc limit 1