instruction: what was patient 021-155303 diagnosed with the first time until 2102?
response: SELECT diagnosis.diagnosisname FROM diagnosis WHERE diagnosis.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '021-155303')) AND STRFTIME('%y', diagnosis.diagnosistime) <= '2102' ORDER BY diagnosis.diagnosistime LIMIT 1