instruction: how many medications were prescribed to patient 007-4322 since 4 years ago?
response: SELECT COUNT(*) FROM medication WHERE medication.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '007-4322')) AND DATETIME(medication.drugstarttime) >= DATETIME(CURRENT_TIME(), '-4 year')