when was the first time patient 1014 got a lab test for platelet count since 19 months ago?
select labevents.charttime from labevents where labevents.itemid in ( select d_labitems.itemid from d_labitems where d_labitems.label = 'platelet count' ) and labevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 1014 ) and datetime(labevents.charttime) >= datetime(current_time,'-19 month') order by labevents.charttime asc limit 1