is any organism found until 3 years ago in patient 12718's last blood (ebv) microbiology test?
select count(*)>0 from microbiologyevents where microbiologyevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 12718 ) and microbiologyevents.spec_type_desc = 'blood (ebv)' and microbiologyevents.org_name is not null and datetime(microbiologyevents.charttime) <= datetime(current_time,'-3 year') order by microbiologyevents.charttime desc limit 1