what was the name of the outputs that patient 51177 last had since 08/01/2101?
select d_items.label from d_items where d_items.itemid in ( select outputevents.itemid from outputevents where outputevents.icustay_id in ( select icustays.icustay_id from icustays where icustays.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 51177 ) ) and strftime('%y-%m-%d',outputevents.charttime) >= '2101-08-01' order by outputevents.charttime desc limit 1 )