instruction: for the last time in 01/last year, when was patient 1912 prescribed for atorvastatin?
response: SELECT prescriptions.startdate FROM prescriptions WHERE prescriptions.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 1912) AND prescriptions.drug = 'atorvastatin' AND DATETIME(prescriptions.startdate, 'start of year') = DATETIME(CURRENT_TIME(), 'start of year', '-1 year') AND STRFTIME('%m', prescriptions.startdate) = '01' ORDER BY prescriptions.startdate DESC LIMIT 1