instruction: how much was albuterol 0.083% neb soln first prescribed to patient 808 in 08/2105?
response: SELECT prescriptions.dose_val_rx FROM prescriptions WHERE prescriptions.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 808) AND prescriptions.drug = 'albuterol 0.083% neb soln' AND STRFTIME('%y-%m', prescriptions.startdate) = '2105-08' ORDER BY prescriptions.startdate LIMIT 1