instruction: when was the first time that patient 018-20179 was diagnosed with a suicidal ideation since 2105?
response: SELECT diagnosis.diagnosistime FROM diagnosis WHERE diagnosis.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '018-20179')) AND diagnosis.diagnosisname = 'suicidal ideation' AND STRFTIME('%y', diagnosis.diagnosistime) >= '2105' ORDER BY diagnosis.diagnosistime LIMIT 1