###HUMAN: when did patient 015-910 come into the hospital for the last time during this year?, ###ASSISTANT: SELECT patient.hospitaladmittime FROM patient WHERE patient.uniquepid = '015-910' AND DATETIME(patient.hospitaladmittime, 'start of year') = DATETIME(CURRENT_TIME(), 'start of year', '-0 year') ORDER BY patient.hospitaladmittime DESC LIMIT 1