ครั้งแรกที่ผู้ป่วย 016-18575 วันนี้หายใจน้อยกว่า 35.0 เป็นครั้งแรกเมื่อใด?ไม่จำเป็นต้องใช้ตารางทั้งหมด
when was the first time that patient 016-18575 today had respiration less than 35.0?It is not neccessary to use all the tables.
 vitalperiodic:  vitalperiodicid [ number]  patientunitstayid [ number]  temperature [ number]  sao2 [ number]  heartrate [ number]  respiration [ number]  systemicsystolic [ number]  systemicdiastolic [ number]  systemicmean [ number]  observationtime [ time] 
SELECT vitalperiodic.observationtime FROM vitalperiodic WHERE vitalperiodic.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '016-18575')) AND vitalperiodic.respiration < 35.0 AND NOT vitalperiodic.respiration IS NULL AND DATETIME(vitalperiodic.observationtime, 'start of day') = DATETIME(CURRENT_TIME(), 'start of day', '-0 day') ORDER BY vitalperiodic.observationtime LIMIT 1