instruction: what was patient 25814's first diagnosis of brain condition nos time on this hospital visit?
response: SELECT diagnoses_icd.charttime FROM diagnoses_icd WHERE diagnoses_icd.icd9_code = (SELECT d_icd_diagnoses.icd9_code FROM d_icd_diagnoses WHERE d_icd_diagnoses.short_title = 'brain condition nos') AND diagnoses_icd.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 25814 AND admissions.dischtime IS NULL) ORDER BY diagnoses_icd.charttime LIMIT 1