when has patient 2002 first had an intake since 08/01/2101?
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 = 2002 ) ) and strftime('%y-%m-%d',inputevents_cv.charttime) >= '2101-08-01' order by inputevents_cv.charttime asc limit 1