instruction: how many times has patient 004-11043 been admitted to the intensive care unit until 2 years ago?
response: SELECT COUNT(DISTINCT patient.patientunitstayid) FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '004-11043') AND DATETIME(patient.unitadmittime) <= DATETIME(CURRENT_TIME(), '-2 year')