when was last time the arterial bp mean of patient 9519 was greater than 111.0 on 12/20/2104?
select chartevents.charttime from chartevents where chartevents.icustay_id in ( select icustays.icustay_id from icustays where icustays.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 9519 ) ) and chartevents.itemid in ( select d_items.itemid from d_items where d_items.label = 'arterial bp mean' and d_items.linksto = 'chartevents' ) and chartevents.valuenum > 111.0 and strftime('%y-%m-%d',chartevents.charttime) = '2104-12-20' order by chartevents.charttime desc limit 1