when did patient 49176 receive an mcv laboratory test for the first time since 01/2105?
select labevents.charttime from labevents where labevents.itemid in ( select d_labitems.itemid from d_labitems where d_labitems.label = 'mcv' ) and labevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 49176 ) and strftime('%y-%m',labevents.charttime) >= '2105-01' order by labevents.charttime asc limit 1