instruction: what is patient 018-86978's height for the first time in 08/this year?
response: SELECT patient.admissionheight FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '018-86978') AND NOT patient.admissionheight IS NULL AND DATETIME(patient.unitadmittime, 'start of year') = DATETIME(CURRENT_TIME(), 'start of year', '-0 year') AND STRFTIME('%m', patient.unitadmittime) = '08' ORDER BY patient.unitadmittime LIMIT 1