had patient 89875 received a vancomycin tests since 12/2104?
select count(*)>0 from labevents where labevents.itemid in ( select d_labitems.itemid from d_labitems where d_labitems.label = 'vancomycin' ) and labevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 89875 ) and strftime('%y-%m',labevents.charttime) >= '2104-12'