instruction: what is the daily minimum value of patient 1902's phosphate since 2104?
response: SELECT MIN(labevents.valuenum) FROM labevents WHERE labevents.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 1902) AND labevents.itemid IN (SELECT d_labitems.itemid FROM d_labitems WHERE d_labitems.label = 'phosphate') AND STRFTIME('%y', labevents.charttime) >= '2104' GROUP BY STRFTIME('%y-%m-%d', labevents.charttime)