instruction: what is the daily average value of vitamin b12 of patient 015-57922 until 2101?
response: SELECT AVG(lab.labresult) FROM lab WHERE lab.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '015-57922')) AND lab.labname = 'vitamin b12' AND STRFTIME('%y', lab.labresulttime) <= '2101' GROUP BY STRFTIME('%y-%m-%d', lab.labresulttime)