###HUMAN: what was the name of the drug, which patient 52898 was last prescribed via right ear route since 02/2105?, ###ASSISTANT: SELECT prescriptions.drug FROM prescriptions WHERE prescriptions.hadm_id IN (SELECT admissions.hadm_id FROM admissions WHERE admissions.subject_id = 52898) AND prescriptions.route = 'right ear' AND STRFTIME('%y-%m', prescriptions.startdate) >= '2105-02' ORDER BY prescriptions.startdate DESC LIMIT 1