had patient 28447 ever had a respiratory rate of greater than 20.0 in 12/2105?
select count(*)>0 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 = 28447 ) ) and chartevents.itemid in ( select d_items.itemid from d_items where d_items.label = 'respiratory rate' and d_items.linksto = 'chartevents' ) and chartevents.valuenum > 20.0 and strftime('%y-%m',chartevents.charttime) = '2105-12'