when was the last time patient 70950 was diagnosed with hemopericardium until 2104?
select diagnoses_icd.charttime from diagnoses_icd where diagnoses_icd.icd9_code = ( select d_icd_diagnoses.icd9_code from d_icd_diagnoses where d_icd_diagnoses.short_title = 'hemopericardium' ) and diagnoses_icd.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 70950 ) and strftime('%y',diagnoses_icd.charttime) <= '2104' order by diagnoses_icd.charttime desc limit 1