when did patient 19040's last intake since 680 days ago occur?
select inputevents_cv.charttime from inputevents_cv where inputevents_cv.icustay_id in ( select icustays.icustay_id from icustays where icustays.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 19040 ) ) and datetime(inputevents_cv.charttime) >= datetime(current_time,'-680 day') order by inputevents_cv.charttime desc limit 1