when was first time patient 5142 was measured with a arterial bp [systolic] greater than 144.0 on last month/03?
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 = 5142 ) ) and chartevents.itemid in ( select d_items.itemid from d_items where d_items.label = 'arterial bp [systolic]' and d_items.linksto = 'chartevents' ) and chartevents.valuenum > 144.0 and datetime(chartevents.charttime,'start of month') = datetime(current_time,'start of month','-1 month') and strftime('%d',chartevents.charttime) = '03' order by chartevents.charttime asc limit 1