have patient 24921's respiratory rate's been less than 15.0 in 09/last year?
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 = 24921 ) ) 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 < 15.0 and datetime(chartevents.charttime,'start of year') = datetime(current_time,'start of year','-1 year') and strftime('%m',chartevents.charttime) = '09'