instruction: when did patient 005-4471 first had the tube feeding residual discarded (ml) output since 08/08/2102?
response: SELECT intakeoutput.intakeoutputtime FROM intakeoutput WHERE intakeoutput.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '005-4471')) AND intakeoutput.cellpath LIKE '%output%' AND intakeoutput.celllabel = 'tube feeding residual discarded (ml)' AND STRFTIME('%y-%m-%d', intakeoutput.intakeoutputtime) >= '2102-08-08' ORDER BY intakeoutput.intakeoutputtime LIMIT 1