instruction: when was the last time patient 006-202970 had urine output on the current icu visit?
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 = '006-202970') AND patient.unitdischargetime IS NULL) AND intakeoutput.cellpath LIKE '%output%' AND intakeoutput.celllabel = 'urine' ORDER BY intakeoutput.intakeoutputtime DESC LIMIT 1