what was the first time patient 17435 had oth periton adhesiolysis's performed until 2 years ago?
select procedures_icd.charttime from procedures_icd where procedures_icd.icd9_code = ( select d_icd_procedures.icd9_code from d_icd_procedures where d_icd_procedures.short_title = 'oth periton adhesiolysis' ) and procedures_icd.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 17435 ) and datetime(procedures_icd.charttime) <= datetime(current_time,'-2 year') order by procedures_icd.charttime asc limit 1