instruction: what is the first time patient 28343 received a prescription for tramadol in 10/last year?
response: SELECT prescriptions.startdate FROM prescriptions WHERE prescriptions.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 28343) AND prescriptions.drug = 'tramadol' AND DATETIME(prescriptions.startdate, 'start of year') = DATETIME(CURRENT_TIME(), 'start of year', '-1 year') AND STRFTIME('%m', prescriptions.startdate) = '10' ORDER BY prescriptions.startdate LIMIT 1