instruction: have patient 25523's been tested since 04/2102 for human chorionic gonadotropin?
response: SELECT COUNT(*) > 0 FROM labevents WHERE labevents.itemid IN (SELECT d_labitems.itemid FROM d_labitems WHERE d_labitems.label = 'human chorionic gonadotropin') AND labevents.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 25523) AND STRFTIME('%y-%m', labevents.charttime) >= '2102-04'