instruction: count how many times patient 021-221706 have had a urine output in 05/2101.
response: SELECT COUNT(*) FROM intakeoutput WHERE intakeoutput.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '021-221706')) AND intakeoutput.cellpath LIKE '%output%' AND intakeoutput.celllabel = 'urine' AND STRFTIME('%y-%m', intakeoutput.intakeoutputtime) = '2101-05'