Query: When was my last wheezing episode resolved?, FHIR Resource: {'resourceType': 'Immunization', 'status': 'completed', 'vaccineCode': {'coding': [{'system': 'http://hl7.org/fhir/sid/cvx', 'code': '140', 'display': 'Influenza, seasonal, injectable, preservative free'}], 'text': 'Influenza, seasonal, injectable, preservative free'}, 'patient': {'reference': 'urn:uuid:2e167b80-1b1b-a84b-feb7-2449200180e1'}, 'occurrenceDateTime': '2023-04-13T01:34:15+05:30', 'primarySource': True}