what's the first time patient 90019 has had a procedure since 2101?
select procedures_icd.charttime from procedures_icd where procedures_icd.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 90019 ) and strftime('%y',procedures_icd.charttime) >= '2101' order by procedures_icd.charttime asc limit 1