what is the output that patient 52456 first had on last month/06?
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 = 52456 ) ) and datetime(outputevents.charttime,'start of month') = datetime(current_time,'start of month','-1 month') and strftime('%d',outputevents.charttime) = '06' order by outputevents.charttime asc limit 1 )