count the number of times patient 28099 received a lab test for bilirubin, direct since 2105.
select count(*) from labevents where labevents.itemid in ( select d_labitems.itemid from d_labitems where d_labitems.label = 'bilirubin, direct' ) and labevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 28099 ) and strftime('%y',labevents.charttime) >= '2105'