what was the name of the specimen test that patient 12572 received for the last time until 19 months ago?
select microbiologyevents.spec_type_desc from microbiologyevents where microbiologyevents.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 12572 ) and datetime(microbiologyevents.charttime) <= datetime(current_time,'-19 month') order by microbiologyevents.charttime desc limit 1