instruction: what is the monthly minimum value of patient 004-32407's weight on the first hospital encounter?
response: SELECT MIN(patient.admissionweight) FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '004-32407' AND NOT patient.hospitaldischargetime IS NULL ORDER BY patient.hospitaladmittime LIMIT 1) AND NOT patient.admissionweight IS NULL GROUP BY STRFTIME('%y-%m', patient.unitadmittime)