instruction: when was patient 031-22988 last given a other microbiology test?
response: SELECT microlab.culturetakentime FROM microlab WHERE microlab.patientunitstayid IN (SELECT patient.patientunitstayid FROM patient WHERE patient.patienthealthsystemstayid IN (SELECT patient.patienthealthsystemstayid FROM patient WHERE patient.uniquepid = '031-22988')) AND microlab.culturesite = 'other' ORDER BY microlab.culturetakentime DESC LIMIT 1